初中英语说明文写作模板【汇编20篇】

写作技巧就是表现时运用的方法，是作者为表情达意而采取有效艺术手段。语文说明文的写作技巧，我们一起来了解一下。

一、 说明文的定义

说明文是以说明为主要表达方式来解说事物、阐明事理而给人知识的文章体裁。它通过揭示概念来说明事物特征、本质及其规律性。说明文一般介绍事物的形状、构造、类别、关系、功能，解释事物的原理、含义、特点、演变等。说明文实用性很强，它包括广告、说明书、提要、提示、规则、章程、解说词、科学小品等。

二、 说明文的特点

说明文的特点是说，而且具有一定的知识性。这种知识，或者来自有关科学研究资料，或者是亲身实践、调查、考察的所得，都具有严格的科学性。为了要把事物说明白，就必须把握事物的特征，进而揭示出事物的本质属性，即不仅要说明是什么，还要说明为什么是这样。应用性说明文一般只要求说明事物的特征，阐述性说明文则必须揭示出问题的本源和实质。 说明文是客观地说明事物的一种文体，目的在于给人以知识：或说明事物的状态、性质、功能，或阐明事理。《中国石拱桥》属于前者，它以赵州桥和卢沟桥为例说明中国石拱桥不但形式优美，而且结构坚固的特征。《大自然的语言》属于后者，文章科学地说明了物候学知识。说明事物特点和阐明事理是说明文的两种类型。

三、 说明文的常用说明方法及作用

1、说明的方法有：下定义,作诠释,举例子,列数字,打比方,作比较,分类别,引资料,摹状貌,做图表 2、明白各种方法的作用。

举例子：这里使用了举例子的说明方法，具体说明了 这种说明方法的作用是使说明的对象具体形象，便于读者理解。

作比较：这里拿和作比较，突出(具体)说明了 作比较用于突出强调被说明对象的特点(地位、影响等)。

列数字：这里使用了列数字的说明方法，准确说明了 (列举了的数字，准确说明了)其作用是使说明准确无误，令读者信服。

分类别：分类别的作用是使说明条理清楚。

打比方：它的主要作用是使说明对象生动形象，增强文章的趣味性。

作诠解：用于解释被说明内容的成因及内在联系。

下定义：其作用是科学准确地解释说明对象的内涵，使说明更严密。

画图表：可使说明内容直观形象。

摹状貌：使说明生动形象，使文章更具可读性。

3、有时说明文借用其他修辞手法来帮助说明，这些手法的作用分析应当紧紧围绕说明对象，依照说明文的要求。

四、 如何写好说明文

如何使说明文物理并重、形神兼备的呢?首要的一点是观察。说明文写作的前提是对要说明的事物非常熟悉。要做到这一点，就要养成认真观察、深入了解的习惯：

观察要有针对性。要带着问题观察，而不是走马观花、浮光掠影。最好能在观察前列出观察提纲，观察时要记笔记、画图标。要善于提出问题。

观察时要分清主次。这就要求我们注意观察的顺序。观察有概括性观察和特写性观察之分。前一种方法有助于抓住事物的概貌，后者则利于把握观察对象的细节和特征。由概括到特写、由全局到局部，是观察的一般原理。

观察重在事物的形。要想传神，写出事物的内涵、原理等，则需要有很好的查阅资料、作调查的能力。比如我们要写一篇文章来说明洛阳牡丹。在写好它的形状、颜色、品种之外，如果能够考察一下洛阳牡丹的来历、其中的牡丹名品在培育中的科学原理，这篇文章就会有说服力，使读者更深刻地认识到洛阳牡丹的文化特色。这就要求我们具备相当的知识积累、广阔的知识面和优秀的调查能力。作为小学生，应当从小注重积累知识和调查能力的训练。比如通过剪报、记笔记、上图书馆和阅览室等途径来有意识地训练自己。

写作说明文还要注意说明的顺序。有合理的顺序，文章才能条理清晰，让人看得明白。说明顺序一般有三种，即空间顺序、时间顺序、逻辑顺序。间顺序一般有从上到下、从左到右、从前到后、从远到近等。时间顺序一般有从古到今、从过去到现在等。逻辑顺序有从现象到本质、从原因到结果、从主要到次要、从整体到部分、从概括到具体等。什么是合理的顺序呢?这要根据人们认识事物的过程以及说明对象本身的特征、规律而定。说明事物的形状、构造等，往往以空间为顺序;说明事物的成因、方法，往往以时间为顺序;说明事物的事理，往往以逻辑关系为顺序。

当然，大多数说明文会综合使用多种说明顺序。因此，在写作时，我们要合理地安排好说明顺序，理清说明文的结构层次。常用的结构层次有并列式、层进式和总分式三种。比如我们以水为题目进行写作，可以先写水的外形特征，再写水的分类，然后写水的用途，这是并列式的写作层次。我们也可以先写水的外形，再写水的成因，最后写水给人类带来的利与害，这是层进式的结构层次。先概括水的用途和特征，再一一细述，就是总分式。结构层次能力需发同学们在长期的写作过程中培养。

As is known to all, China is popular for its emperor of bicycles. This is

because our country is still a developing country and few people can afford

private cars. The demand for a means of transport is met by making millions of

bicycles available. Riding a bicycle has a lot of advantages over driving a car.

First, it is a physical exercise to ride a bicycle. In contrast, sitting in the

car, one tends to gain weight. Besides, it is nmch more economical to ride a

bike than drive a car. On the one hand,the only fee a bike-rider has to pay is

the annual tax. However, the annual fees for a car are costly. On the other

hand, a bike neednt be equipped with a parking lot, but a car must. Most

important of all, it is beneficial to the environment to ride a bicycle because

the bike doesnt consume petrol; it is a pollution-free transport. In contrast,

the exhaust released by the car is harmful to the environment. Since China is a

developing country with a large population, bicycles will still be the most

popular means of transport in China for quite a long time. Most people will

still ride bicycles to go to work or to school. The emperor country of bicycles

will remain for at least dozens of years.

The 15-Day Celebration of Chinese New YearThe first day of the Lunar New Year is "the welcoming of the gods of the heavens and earth."Many people abstain from meat on the first day of the new year because it is believed that this will ensure long and happy lives for them.

On the second day, the Chinese pray to their ancestors as well as to all the gods. They are extra kind to dogs and feed them well as it is believed that the second day is the birthday of all dogs.The third and fourth days are for the sons-in-laws to pay respect to their parents-in-law.The fifth day is called Po Woo. On that day people stay home to welcome the God of Wealth. No one visits families and friends on the fifth day because it will bring both parties bad luck.On the sixth to the 10th day, the Chinese visit their relatives and friends freely. They also visit the temples to pray for good fortune and health.The seventh day of the New Year is the day for farmers to display their produce. These farmers make a drink from seven types of vegetables to celebrate the occasion.

The seventh day is also considered the birthday of human beings. Noodles are eaten to promote longevity and raw fish for success.On the eighth day the Fujian people have another family reunion dinner, and at midnight they pray to Tian Gong, the God of Heaven.The ninth day is to make offerings to the Jade Emperor.The 10th through the 12th are days that friends and relatives should be invited for dinner.

After so much rich food, on the 13th day you should have simple rice congee and mustard greens (choi sum) to cleanse the system.The 14th day should be for preparations to celebrate the Lantern Festival which is to be held on the 15th night.

人们一提到虎，就会想到它那健壮的身体，锋利的爪牙和威风的样子。的确，虎被 称为百兽之王，它是胜利和力量的象征。

在现实生活中，虎的数量很少，中学生作文《初中说明文作文》。在九种虎中，有四种已经灭绝了。仅剩下的五种虎中，也有 几种的数量仅剩两位数了。但美洲虎，东北虎的踪迹，还是可以在森林中找到，还是一样的 威风。

东北虎的毛色非常美丽，额前有一个“王”字形的斑纹，一身淡黄色的长毛上夹杂着黑色条 纹，显得十分漂亮；它那强健、粗壮的四肢和一对炯炯有神的眼睛，又使它显得威风凛凛。 东北虎是肉食性动物，它身上最厉害的武器就是锋利的爪和犬齿。它的爪长达十多厘米，伸 缩自如，比钢刀还利，就是牛皮也禁不住它一抓；犬齿长6厘米，是撕碎猎物不可缺少的“ 餐刀”；虎的舌头上有很多尖锐的刺，适于嘶咬。趾垫和掌心的肉垫，像海绵似的柔软，使 东北虎走起路来像猫一样，无声无息，敏捷而富有弹性。

所有种类的老虎几乎都有这些特点，这是它们身体条件上的优势，而它们的捕食本领也比狮 子高明，常采取静伏、潜行，好搞突然袭击。它的一声长啸，会吓得许多动物伏地不动，然 后 使用扑、掀和剪等方法来捕捉。虎的一扑很厉害，能远扑七米之外，跃高2米，一掌可以击 倒一只鹿。它的尾巴就像一条铁棍，“一剪”可以打断动物的腰和腿。它还有尖牙利爪，遇 上牛这样的大家伙，就从后面跃上牛背，抓住头颈，前顶后扯；如果从正面袭击，就会抓住 咽喉，连咬带撕，再壮的牛也只能任它宰割了。

虎在热带和寒温带森林中都有栖息，它耐寒超过耐热，喜欢洗澡，常常出没在离水较近的草 丛之间。在饱餐之后，它们一般都比较喜欢在安静的地方休息。虎与狮不同，一般都在晨昏 时才出来觅食，但是行动却十分隐蔽。

除母虎带仔外，绝大多数的虎都是单独栖居，并有明显的巢域。母虎一般两三年一胎，一胎 一般二仔。由于森林日趋减少，素有“森林的保护者”美誉的老虎不但保护不了被人类不断 吞噬的森林，连自身的生存也受到环境问题的严重严胁。目前，我国虎类总共只有3000多只 。

由于虎的价值大，数量又少，这“森林之王”的雄姿已很难见到。目前东北虎和华南虎均已 被列为我们国家的一类保护动物，相信经过社会各界人士不懈的努力，一定会使子孙后代们 永远可以见到这百兽之王— —虎的雄姿。

The definition of happiness always causes the public’s attention. Some

people believe that making a lot of money and earning great reputation are the

standard to define success, while some people think that spending more time with

their families deserves all the things and it is their bliss. In my opinion, the

meaning of happiness varies according to different people, but there is one

thing in common, which is their positive attitude to life. I am so lucky to born

in a happy family, and my parents give me all their love. Though we are

ordinary, I am so satisfy with my life now. I cherish the thing I have.

My Favourite Festival

My favoruite festival is Mid-Autumn Festival. On that day, I can get moon cakes, fruit and many other delicious foods. The moon cakes are round like the moon. They are delicious. They are different inside. On Mid-Autumn Festival I see my elder brother back from work. We get together. We talk and watch the moon! How happy we are!

Over the last page calendar in 2010, time wheels and leave a deep imprint.

With winter snow after the warmth of the sun, in the joyful mood, 2011 to keep

the New Years day.

New Years day, is a connecting link between the preceding and the node.

The New Year is about to begin, standing on new starting point, the aftertaste

is past, have heavy harvest; Looking ahead, waiting for us is the beautiful

future. After a busy year of you I, can at this time to make a little stay,

close your eyes, bathed in sunshine, enjoy harvest thick feeling. From this day

started again, we will have a new targets, and on a one-year new journey.

The grass sprout out of the earth, clouds scud across, and year after year,

annual similar different. But, has not changed for New Years day is my

expectation.

When I was young, every New Year comes a few days ago, the morning wake up,

the first thing is bare bottom from woli leafing out of nowhere, then this

calendar day several times of snapping to finger countdown. Young Im such a

keen on New Years day this festival, in fact, only to have something good food,

new clothes to wear, but also need not go to school.

New Year dyed the our happy childhood, pulled close distance we grow up.

Slowly, I from elementary school, junior high school, arrive at the university,

blossom years as accelerated film a flash and pass. This years New Years day,

we are in a busy spent, work overtime everyday, we need to make very late. In

order to finish the task smoothly, we are often a pack of instant noodles, a

computer, four people take turns input. In order not to delay working, teacher

Chen just will just go to the kindergarten children locked in the home. The

nearest xiaoliu has also been no home, and together we live in the dormitory,

have a meal. Less childhood innocent romance, much work responsibility, also

enjoy our work of fun. During, no one has complained, increasingly mature we use

special ways of enjoying the unique New Years day holiday. As a word that said:

"even though we cannot stop the passage of time, but we can dominate oneself

mood."

New Year, new opportunities, we need a new struggle. Wind is being tidal

flat, hereunder sails; No matter what happens, the more must be quickened his

horse. In the New Year, let us follow temple head, with the development of steps

to the glorious future -- -nikita Khrushchev and walked on.

When i was in high school, I had to study all the time and hardly had spare

time to do what i wanted to.Besides, I had to focus on my textbooks and doing

exercise again and again. Therefore, I had little time to read magazines and

novels and watch TV. what was worse, I couldnt play with my friends a lot, which

I couldnt stand the most. In a word, all i did in high shool should be

considered for the College Entrance Examination.

However, my college life is totally different from the life in high

school.I can arrange my time freely. I spend most of my time reading in the

library, where I can open my eyes and broaden my mind.In my free time, I also

join some clubs,where i can make a lot of friends of different majors. My

teachers in college are so kind and knowledgeable that they not only teach us

knowledge but also how to be a person and how to get on with others. In

addition, there are more opportunities for me to improve myself.

I believe college life is an important stage in my life. In college, i can

learn how to learn by myself, how to get on with others, how to live

independently.College provides me with a stage where i can show myself and be

myself.

Today is Saturday, I don’t need to go to school, so I decided to take some morning exercises. Early in the morning, I went out of the house and looked around, the city was so quiet. With few cars, the air was fresh, I felt so comfortable. Besides the people who took the morning exercise, I found some people who worn the orange uniform, they were working. This was the first time for me to see the cleaners work in the morning, they were easily neglected, because they worked so early and when the time for people to go to work, cleaners rested. Watching these cleaners working, I feel so thankful for them, they were doing the greatest job. People praised them as the city’s dressers, they kept the city clean all the time and brought comfort to people. They are the respectable people, we should applause for them.

Spring festival is the most important festival in China.During Spring festival,people visit their relatives,sending their best wishes for a new year.Children are the happiest in spring festival.They will receive red envelopes that contain money as new year presents.They can also play crackers and fireworks.Whats more,they are given a lot of freedom,which they have dreammed of for a whole year.During Spring festival,there will be plenty of foods.Thats why many people put on "holiday weight" after Spring festival.When it comes to food,there are many festival specialties.The world famous Jiaozi and Chunjuan(spring roll) have even been accepted by foreigners as fast foods.Spring festival usually comes in Feburary,sometimes earlier.Its a festival full of hope and good wishes.Its a symbol of Chinese culture.

[关于春节的初中优秀英语作文

English is widely used throughout the world.

So many people speak it as a second language. Online, youll find lots of

information in English. If you dont understand English, how can you know more

about the world, how can you get more knowledge. At international conferences,

English is also used as the official language. Without good English, you cannot

express your ideas well at such conferences, neither can you introduce China to

the outside world.

机遇是成功的因素之一。但是机遇并不经常光顾小学生作文 你也可以投稿，而且并不是所有机遇都必然导向成功。除此之外，机遇通常就在刻苦的工作中，只是许多人觉察不到而已。因此如果你想成就事业，就必须努力工作以做好迎接机遇的准备。否则，即便机遇来了你也会失去它。我认为，我们社会中的每个人都有许多机遇，但只有那些做好充足准备的有才能的人才会利用机遇取得成功。

Opportunity and Success

Opportunity is one of the elements of success. But opportunities don’t come often. And not all the opportunities can certainly lead to success. Moreover, opportunities are usually disguised as hard work; therefore most people don’t recognize them. So if you want to achieve something, you must make efforts and get prepared. Otherwise, you will take no advantage of opportunities when they come to you. In my opinion, there are plenty of opportunities for everyone in our society, but only those who have made enough preparations and are highly talented can make use of them to achieve their purpose.

I used to be a humble girl, the thing is that I am too humble, I always think that my ability is not good enough, but in fact, I am just not confident. One day, when I went back home after school, my mother asked me to help her, she had some problems with the computer.

I helped her to solve her problems, she said I was so great, I knew so much things.

Until then did I realize that I should be confident, I have ability to do some things. When people give me compliment, I will accept and say thank you, I am confident now. I believe in myself, I won’t be defeated by the difficulty.

曾经我是一个谦虚的女孩子，问题在于我太谦虚了，我总是觉得我的能力不够好，但是事实上，我只是不自信。有一天，在我放学回家的时候，我的妈妈叫我给她帮下忙，她对电脑方面有些问题。我帮助她解决了她的问题，她说我很棒，知道那么多的事情。直到那时我才意识到我应该变得自信，我有能力做很多事情。当人们给予我赞美的时候，我会接受，并且表示感谢，如今我变得自信。我相信自己，不会被困难****。

[初中英语作文：我找到了自信

I like to make friends, I can share my happiness and sorrow with friends. Friends are very important part of our lives, without them, I will be very lonely. I learn it when I was very small. It was Friday, I went to school to join the English contest, before I went into the classroom, I found I did not bring the admission card, I felt so worried, without admission card, I could not walk into the classroom. My friend Li looked at me and asked me what happened, I told him the truth, then he asked me to stay here and he rushed to our classroom. Ten minutes later, he came back with my admission card. I was so thankful, friends are very important.

我喜欢交朋友，我可以和朋友们分享我的喜怒和哀乐。朋友是我们生活中很重要的一部分，没有朋友，我会感到很孤单。我在很小的时候就学到了这点。那是星期五，我去学校参加了英语竞赛，在我走进教室之前，我发现我没有带准考证，我感到很担忧，没有准考证，我就不能走进教室。我的朋友李看着我，问我发生了什么事情，我告诉他事实，然后他叫我留在原地，他跑去了我们的教室。十分钟以后，他回来了，带着我的准考证。我很感激，朋友是很重要的。

[初中英语作文多交朋友

When memory began for me, my grandfather was past sixty-a great tall man

with thick hair becoming gray. He had black eyes and a straight nose which ended

in a slightly flattened tip. Once he explained seriously to me that he got that

flattened tip as a small child when he fell down and stepped on his nose.

The little marks of laughter at the corners of his eyes were the prodnct of

a kindly and humorous nature. The years of work which had bent his shoulders had

never dulled his humour nor his love of a joke.

Everywhere he went, "Gramp" made friends easily. At the end of half an hour

you felt you had known him all your life. I soon learned that he hated to give

orders , but that when he had to, he tried to make his orders sound like

suggestions.

One July morning, as he was leaving to go to the cornfield, he said :

"Edwin, you can pick up the potatoes in the field today if you want to do that.

" Then he drove away with his horses.

The day passed, and I did not have any desire to pick up potatoes. Evening

came and the potatoes were still in the field. Gramp, dusty and tired, led the

horses to get their drink.

"How many bags of potatoes were there?" Gramp inquired. "I dont know.

"

"How many potatoes did you pick up?"

"I didnt pick any. " "Not any! Why not?"

"You said I could pick, them up if I wanted to. You didnt say I had to.

"

In the next few minutes I learned a lesson I would not forget: when Gramp

said I could if I wanted to, he meant that I should want to.

Gram hated cruelty and injustice. The injustices of history, even those of

a thousand years before, angered her as much as the injustices of her own

day.

She also had a deep love of beauty. When she was almost seventy-five, and

had gone to live with one of her daughters, she spent a delightful morning

washing dishes because, as she said, the beautiful patterns on the dishes gave

her pleasure. The bird, the flowers, the clouds-all that was beautiful around

her- pleased her. She was like the father of the French painter, Millet, who

used to gather grass and show it to his son , saying , "See how beautif ul this

is ! "

In a pioneer society it is the harder qualities of mind and character that

are of value. The softer virtues are considered unnecessary. Men and women

struggling daily to earn a living are unable, even for a moment, to forget the

business of preserving their lives. Only unusual people, like my grandparents,

manage to keep the softer qualities in a world of daily struggle.

Such were the two people with whom I spent the months from June to

September in the wonderful days of summer and youth.

Unit Three

Prisoners of War?

Thousands of war prisoners were kept in captivity in the bulky camp. They lived in clutter and had to deal with chore. They must show categorical obedience or else receive caustic chiding. The guarding officers censure them very often, as well as clamoring carnal punishments. Some captives got bruise and clots all over. Male prisoners lost their collaterals and female ones fail to keep chaste.??

They wear burnished canvas, and rested in circumscribed room with small capacity and caliber. They chafe each other and brawled frequently. They were chary of moving and can hardly budge. Their situations captivated lots of reporters, who castigated the government with cogent proof. However, the government gave bombastic data and bragged about the conditions in the camps.??

After the calamity of war ceased, large numbers of captives were longing for the boon of brisk free life. According to a clandestine bond between the two canny governments, a process of exchanging captives will soon commence. This is considered as opening a cleft in the clogged wall between the two countries.

In my memory, a lot of things happened in the Spring Festival last year, but the happiest thing for me was to put up fireworks and watch the Spring Festival Gala.

On the thirty night of the year, after our family had finished the dinner, I could not wait to wait in front of the TV set, waiting for the start of the Spring Festival Gala. Eight oclock arrived at the end of the party. I cant keep my eyes on the TV, and I dont want to leave half a step, and Im afraid to miss a good program. The program of the Spring Festival Gala is quite a lot: there are cross talk, there is a little piece, and the singing and dancing acrobatics show, the most magical thing is magic and face change. Show than a fun, than a wonderful, we can sometimes be absorbed in one family, sometimes uproarious.

This night, I was so excited that I didnt sleep well overnight. How I wish the Spring Festival of 20XX came quickly, so that I could look at the Spring Festival Gala and fireworks as happy as last year.

My dream is to study abroad in the future. I am always that kind of life can come true soon. But, before I realize my dream, I have to do some preparation. I think the most important thing I need to do first is to adapt the life there.

It is said that there is a big difference between the eastern and western culture.

If I know nothing, it is easy for me to have culture conflict. It will put me into an embarrass place. For example, dragon is the leader for all animals and it has holy good meaning in china. But it means violence in the western country.

I need to learn as much the cultural conflicts as possible to make my oversea life become easier.

我的梦想是以后可以去留学。我总是希望那样的生活能早日成真。但是，在实现梦想之前，我得做一些准备工作。我想我首先需要做的是适应那里的生活。据说东西方文化是有差异的。如果我什么都不知道，很容易发生文化冲突。这会置我于一个尴尬的地方。例如，龙是在中国是万兽之王，有着无比神圣的意义。但是在西方国家则是暴力的象征。我要尽量了解的文化冲突，这样我的留学生活才会变得更简单。

[初中英语作文：东西方文化差异

Main Characters: The little prince, the pilot, the rose, the fox, the snake, etc.

Despite I’ve not in my childhood yet, I still prefer reading fairy-tale stories. The tales, which accompany with me in my old days, often make me think of some precious experience and sensation which only belong to children. This summer I’ve review this kind of tale, which was published in 1940. It’s the world-famous fairy-tale by the French author, Antoine de St-Exupery, The Little Prince.

As many other fairy-tales, the outline of The Little Prince is not very complex. ―I‖, the narrator of the story, is a pilot whose plane has something wrong and lands in the Sahara. In this occasion, the pilot makes the acquaintance of the little prince, a little boy from another planet, the Asteroid B612. The little prince has escaped from his tiny planet, because he has some quarrel with a rose, which grows on his planet. In that case he left his own planet and took an exploration at some neighbor asteroids.

On his all-alone journey, the little prince meets different kinds of people, which includes a king, a conceited man, a tippler, a businessman, a lamplighter and a geographer. From these people he gets a conclusion that the grown-ups are very odd. Following the instruction of the geographer, he descends in the Sahara, on the earth.

Traveling on the earth, the little prince, who sees a garden of five-thousand roses, is overcome with astonishment and sadness, as he considers his rose is unique in the universe before. At that time a fox appears. The fox, who tell the little prince about the meaning of the word ―tame‖, becomes his new friend. At the time to say farewell, the fox makes him know that his rose is unique because she is his rose and tamed by him. From that the little prince begins to treasure friendship and be responsible to his rose.

At the anniversary day of his descent of the earth, rejecting the pilot’s advice, he goes back to his own planet by bite of a snake. ―It’s too far. I can not carry this body with me. It’s too heavy.‖ he said. He tells his friend, the pilot, he must be responsible for his rose, so he has to go back. At the end the author doesn’t tell us the ending directly. Maybe it’s more significant for us to imagine, and for more, think over.

[小王子初中英语读后感

（四）语言准确简明，文字通俗浅显

选用准确的语言，精当地解说事物的事理，是说明文语言的基本要求。说明文是以介绍知识性内容为主的，只有如实反映被说明内容的客观情况，才能保证知识的科学性。相反，语言不准确就会失去知识的科学性。

明代学者徐光启笔译古数学家欧几里得的《几何原理》，其中的一节：

“凡论度必始于一体。自点引之而为线，自线广之而为面，自面积之而为体，各自三大纲。是心有长而无阔者谓之线，有长与阔而无厚者谓之面，长与阔厚俱全者谓之体。唯点无长阔厚薄，其间不能容，不可以数度，然线之两端即点，而线面体皆由此生。点虽不入于数，实为从数之本。”

这节解说数学基本概念的说明文，把什么是点、线、面、体，点与数度的联系和区别作了确切的阐释，语言也很精当。

此外，在说明文中往往有些内容是带有专门化的科学知识，涉及一些专门名词和专业术语，在说明中特别要求把它们运用得准确无误，使读者便于领会。如：“航空”与“航天”是两个不同的概念，有篇文章作了这样的解说：“飞机在大气层内飞行，称为航空;卫星、飞船在大气层外飞行，称为航天。它们是采用不同的飞行器在不同的空间来完成飞行任务的”。这种解说是十分准确的，使人对什么叫“航空”、什么叫“航天”得到了科学的了解。

说明文的语言必须简要精当。看下面的这段文字：

“蝉的幼虫脱皮是从背上开始的。先出来的一层旧皮从背上裂开，露出淡绿色的蝉来。先出来的是头，接着是吸管和前腿，最后是后腿和折叠着翅膀，只留下尾边尖儿还在那层旧皮里。这时候，它腾起身子，往后翻下来，头部倒挂着，原来折叠着的翅膀打开了，竭力伸直。接着，用一种几乎看不清的动作尽力把身体翻上去，用前脚的爪子钩住那层旧皮。这个动作使它的尾巴尖儿从那层旧皮里完全脱出不了。那层旧皮就只剩下空壳，成了蝉蜕，。从开始到完全脱出来，大约要半个钟头。

这段文字不到二百个字，具体说明了蝉的幼虫脱皮的整个过程。用简明的语言把幼虫脱皮的复杂动作细致而真切地写出来了。文字不枝不蔓，语言富有表现力，给人很清晰的印象。

说明文要介绍一些科学知识和一些内容，往往是一般人所不熟悉的内容人，要把专门化的科学知识解说清楚，让人易于了解，必须做到深入浅出，通俗易懂，生动活泼，富有趣味。如，《洲际导弹自述》是一篇介绍洲际导弹知识的科技小品。文章用拟人化手法把洲际导弹问世、分类、构造、特点及其威力和弱点都解说得十分清楚，文章把它赋予假定的人类行为，读起来生动风趣，易于理解。为了把说明文写得生动活泼、通俗易懂，人们常常运用各种修辞手法，增强文章的形象性、趣味性。

Remember, I particularly like the puppy, always wanted my mother to buy me a.

One day after school, I just entered the door, my father was happy to say to me: "You do not want to keep the dog, my mother bought you a ... ..." Dad did not finish, I interrupted his words , "Great", and then I immediately looking for a home in the East looking for, that is, did not find my puppy. My father see me looking for something to know that I was looking for a puppy, then pointed to the phone below said: "where it!" I looked at the location of my father said, I saw a lovely puppy is obediently squatting On the ground! I hold the dog asked his father: "We give the dog what name is it?" Dad immediately said: "It is called joy!" I thought for a moment before saying: "Well.

"Huanhuan" whole body like snow as white, the distance to see, really like a pompon. Round face with a pair of agate-like eyes, from time to time flickering, look at the wizard effort. Its two soft ears, always bowed. "Huanhuan" also often put the red blood out of the tongue, licking Tim slightly raised his little nose, as if in the massage.

"Huanhuan" and I am most affectionate, as long as it is happy, will use claws to rub my legs, if it is not happy ah! Its eyes tearful, as if someone hit it or call it like.

"Huanhuan" it is not only lovely and very naughty, take the last time to say it, my mother and take it out for a walk, go home, it suddenly rushed to us, ran into the lawn to roll, that way Naughty!

Sometimes it made me angry, and I ignored it, when it was flashing in her eyes, as if to say to me: "little master, I was wrong." I see it the poor look, but also can not help but pick up it, comfort it.

This is my naive puppy that day!