写秋天的英语作文怎么写(精选20篇)

Know the call is gone, the geese are also arranged in a "shaped" fly to the south, and all this tells us: summer has passed, the fall came.

Autumn sky blue and blue, like a blue sea. The sky is like a small white clouds flying in the sky fly.

Look, the fields, the sorghum red face; rice mature, golden, like a layer of thick gold on the ground; cotton to start their "body of a cotton; peanuts to their heads buried deep Under the land.

Look next to the orchard, a string of grapes like a purple gem. Red apple hanging on the tree, like a lantern. Pomegranate opened his coat, revealing the crystal-like big fruit.

Autumn is over, chrysanthemum is open. Beautiful chrysanthemums have a variety of colors: red like fire, white like snow, yellow like gold ... ... leaves turn yellow, falling from the tree down, like a butterfly only dancing. Swallows fly to the south, the frog is also digging, ready to comfortably who a big sleep.

Autumn not only brought us happiness, but also brought us a good harvest!

I love autumn, love the field of autumn!

秋天是清高的，如果你在春天播种夏天耕耘，那么秋天是收获的季节。下面是小编分享的有关美丽的秋天英语作文，欢迎大家阅读！

Call - call - call! Hear the voice of wind. Ah! Autumn is finally here!

Garden, chrysanthemum competing opened! There are white the light yellow of … … Colorful chrysanthemums flourish in light wind, as if greeting them with people! Sweet-scented osmanthus trees out of the light yellow flowers. A wind blowing, a fresh wind into the nose, ah, really incense!

Orchards, the apple red, like little brothers face. Aunts and uncles are tiptoe with apple picking. Thunk! A ripe apple from the tree fell down. Persimmon tree, hanging on a persimmon tree, far from looking like a red lantern! Grapes on a channeling channeling a , as one finally purple beads, purple was black, people really want a bite it.

Fields, the endless golden rice, just like the earth covered with a layer of gold to the carpet. Farmers are busy on the busy man under, while cutting rice, while rice into basket. Face expression of joy and happiness.

Autumn is a season of charming scenery, it is a harvest season. Ah! The fall, you really beautiful you!

呼-呼-呼!又听到秋风的声音。啊!秋天终于来了!

花园里，菊花竞相开放了!有雪白的、浅紫的、淡黄的……五颜六色的菊花争奇斗艳，在秋风中轻点着头，好像在跟人们打招呼呢!桂花树上开出了淡黄的小花。一阵轻风吹来，一股清香飘入鼻中，啊，真香!

果园里，苹果红彤彤的，就像小弟弟的脸。叔叔阿姨们正踮着脚跟摘苹果。咚!一个熟透的苹果从树上掉了下来。柿子树上，一个个柿子挂在树上，远远望去像一个个红灯笼!葡萄架上的葡萄一窜窜、一簇簇，像一颗颗紫色的珠子，紫得发黑，让人真想咬它一口。

田野里，金黄色的稻子一望无际，就像给大地铺上一层金黄的地毯。农民伯伯正忙上忙下的，一会儿割稻谷，一会儿将稻谷装进篮子里。脸上露出欢乐和喜悦的表情。

秋天是一个景色迷人的季节，更是一个丰收的季节。啊!秋天，你真美呀!

[有关美丽的秋天英语作文

Hear the voice of wind. Ah! Autumn is finally here!

Garden, chrysanthemum competing opened! There are white the light yellow of ... .... Colorful chrysanthemums flourish in light wind, as if greeting them with people! Sweet-scented osmanthus trees out of the light yellow flowers. A wind blowing, a fresh wind into the nose, ah, really incense!

Orchards, the apple red, like little brothers face. Aunts and uncles are tiptoe with apple picking. Thunk! A ripe apple from the tree fell down. Persimmon tree, hanging on a persimmon tree, far from looking like a red lantern! Grapes on a channeling channeling a , as one finally purple beads, purple was black, people really want a bite it.

Fields, the endless golden rice, just like the earth covered with a layer of gold to the carpet. Farmers are busy on the busy man under, while cutting rice, while rice into basket. Face expression of joy and happiness.

Autumn is a season of charming scenery, it is a harvest season. Ah! The fall, you really beautiful you!

呼-呼-呼!又听到秋风的声音。啊!秋天终于来了!

花园里，菊花竞相开放了!有雪白的、浅紫的、淡黄的……。五颜六色的菊花争奇斗艳，在秋风中轻点着头，好像在跟人们打招呼呢!桂花树上开出了淡黄的小花。一阵轻风吹来，一股清香飘入鼻中，啊，真香!

果园里，苹果红彤彤的，就像小弟弟的脸。叔叔阿姨们正踮着脚跟摘苹果。咚!一个熟透的苹果从树上掉了下来。柿子树上，一个个柿子挂在树上，远远望去像一个个红灯笼!葡萄架上的葡萄一窜窜、一簇簇，像一颗颗紫色的珠子，紫得发黑，让人真想咬它一口。

田野里，金黄色的稻子一望无际，就像给大地铺上一层金黄的地毯。农民伯伯正忙上忙下的，一会儿割稻谷，一会儿将稻谷装进篮子里。脸上露出欢乐和喜悦的表情。

秋天是一个景色迷人的季节，更是一个丰收的季节。啊!秋天，你真美呀!

秋天，一个丰收的季节。下面是小编整理分享的秋天的世界英语作文，欢迎阅读。希望对大家有所帮助！

Autumn dusk. Long time did not appreciate her love, deep and long. Autumn unique charm, and spring hegemony. Under ancient ink Chunhua Qiuchou month is sustenance. I prefer autumn.

With a heart to feel the pain, eyes flowers wither, Ice cool wind, rain and cold unfeeling.

But I am very happy. Open the windows, pulled out a perfect arc, slowly, and with the fall of the beat, opened his eyes.

In front of the scene almost no change. I saw, not the dream of confusing, do not dream of nada. Opened his eyes in an instant, I felt disillusioned fantasy and handover. Road, gray, for thousands of years do not seem to change; trees are maintained throughout Junzi, I never felt that warm, cars, sparse few, wandering.

However, autumn happens there. She tears it? Do you want people to bridge the depths of her soul scars? The people began to indulge, the rain fall soft atmosphere. All plants begin swaying, you can say looming. Wucaiche pavement like, a little bit of golden gradually spread all over the body it is the leaves! Roadside tree then play again in gold, like the sunset with lake reflection cross-hui India, car? All quiet, this is my autumn! Falling leaves no bleak fall, but fly into the air. Like butterfly ......

Suddenly, they feel cool skateboarding spread to nourish the body from the back of the hand. Ah, autumn, you let me love you in fantasy, but in truth you are tired.

When I looked around again, beheld a pot of chrysanthemum. Stroll vision for so long, finally I found my dream. Cluster, golden, burning in my mind.

Still the same tree, road, car. But I finally saw the autumn. Autumn rhyme is to get a taste of fantasy and realize it. Autumn in the life of fantasy, the fantasy autumn dissolved in the world.

深秋黄昏。好久没领略过她的爱，深远而绵长。秋独具韵味，与春争霸。古人笔墨下春华秋愁，月是寄托。我偏爱秋。

用伤痛的心来感受，眼前百花凋零，风冰冰凉凉，雨冷酷绝情。

可是我现在很快乐。打开窗户，拉出完美的弧，缓缓地，和着秋的节拍，睁开双眼。

眼前的景几乎没有任何变化。我看见的，不是梦境的扑朔迷离，没有梦境的虚无缥缈。在张开眼的瞬间，我感到幻想与幻灭的交接。路，灰的，几千年似乎都不改变；树，自始至终都保持着军姿，那温暖我再没感觉到，车，稀疏的几辆，徘徘徊。

可是，秋雨偏偏出现了。是她流泪了吗？她是否要弥合人们心灵深处的伤痕？整个人开始沉醉，沦陷在雨中柔和的气氛。所有的花草开始摇曳，可以说若隐若现。路面象五彩池，一点一点的金黄逐渐铺遍了它全身，是枯叶！然后路旁的树又在挥金，像夕阳余晖与湖的倒影交相辉印，车呢？一切静谧，这才是我的秋！枯叶并没凄凉的坠落飘零，而是纷飞向空中。似枯叶蝶……

突然，凉凉滑滑的滋养的感觉从手背蔓延至全身。啊，秋雨，你让我在幻想中爱你，又在真实中厌你。

当我再次放眼望去，瞅见一盆菊花。视野漫步如此之久，终于找到了我的梦。一簇，金黄，燃烧在我脑海。

依旧是不变的树、路、车。但是我终于看见了秋。秋的韵是要幻想与悟才领略得到。生活中的秋处在幻想中里，幻想中的秋溶在世界中。

[秋天的世界英语作文

In the spring,everything become green,the grass come out,there are flowers everywhere.

In the summer,its very hot,you can hear birds chirping in the tree and frogs singing in the riverside.

In the autumn, everything become yellow,the fruits are mature,and wheat is ripe,its the harvest time.

In the winter, it snows here. Everything is covered with whiteness.

How beautifel my hometown is!But I like winter the best.I can make a snowman and play outdoor.It is so exciting.

I like the spring of vitality,it makes me kind of dedication to life; the busy summer I like bright,beautiful and full,because it is not always the envy of others; I like winter Shen Su,permanent collections,as It contains the life and vitality.However,I prefer the autumn of my eyes,he it is so bleak,so the United States.So colorful.

Fall is harvest season so that we do not have to worry cold winter need food,the trees apples,pears children,Sinopodophyllum are you will not let me I will not let you argue the knot over the fruit,really want to go here end of a fruit,delicious taste that can not bear,lest they disturb pyronaridine beautiful dream

Well,red maple leaf as fire,falling from a tree just like a butterfly dancing in tribute to the beautiful autumn.Story is also in full bloom,though they do not have beautiful flowers in spring,autumn,given the addition of a few angry.People spend the hot summer,and praised the fall,as they fall to cool.

I am the eyes of autumn,was not letting a hundred flowers bloom in spring are the decorative chrysanthemum; I was not the eyes of the autumn leaves of the lush summer,but the falling leaves; the fall of the eyes,although I did not understand the snow day,but blowing it heart of the cool breeze

The fall,my eyes will always be so distinctive,so fascinating!

我喜欢春天的勃勃生机,它令我对生命有种执着;我喜欢夏天的繁华似锦,美丽充实,因为它总是让人羡慕不己;我喜欢冬天的沉肃蕴籍,收藏永恒,因为它蕴藏着生命和生机.但,我更喜欢我眼中的秋天,他它是那么的萧瑟,那么的美.那么的色彩斑斓.

秋天是个丰收的季节,让我们不必担心严寒冬天所需要的食物,看,树上的苹果,梨儿,桃儿,都你不让我我不让你的结满咯果子,走到这里真想结一个果子,尝尝那美味,可又不忍心,生怕打扰咯它们那美丽的梦境

看,那枫叶红的像火,从树上掉下来像一只只翩翩起舞的蝴蝶,在赞颂秋天的美好.秋菊也绽放了,虽然它们没有春天的百花艳丽,却给秋天增添了几分生气.度过炎热夏天的人们,称赞秋天,因为秋天带给他们凉爽.

我眼中的秋天,虽没有春天的百花齐放却有菊花的点缀;我眼中的秋天虽没有夏天树叶的茂密,却又枫叶的飘落;我眼中的秋天虽没有懂日的雪景,却又吹拂人们心田的凉风

秋天,我的眼中永远是那么的有特色,那么的吸引人!

Autumn, cloudless, autumn wind blowing.

Migratory birds are eager to fly to the south. Dayan nodded in a row, "people" shape, neatly flying from the air, so, no longer hear the birds that crisp sound of the sound. Sparrows are chattering to find food, frogs grabbed the hole, ready to sleep comfortably sleep, so wake up next spring!

Orchard, a row of fruitful scenes. Like a childs face; pear Huang Chengcheng, like a small gourd; red hawthorn like a small lantern; a string of purple grapes, like pearl crystal translucent.

In the field, sorghum is like drunk, nodded frequently; corn is yellowing clothes to sleep; soybeans are also small slope of the belly, jumped out; cabbage like a team of soldiers neatly arranged in the vegetable The Farmers are busy harvesting the results of a year, the field from time to time bursts of laughter ... ...

Ah, autumn scenery really beautiful ah!

Do not know how long the effect, as if the fight was a nervous gradually revealing the known, the field from its broad chest in long plume from the atmosphere on the slopes and there is water ongenerally spread at the Qingming, round trees and crops have begun to sway in the breeze, the leaves become calm and. Dew back in the early morning and evening wetting the ridge, quietly put up the field. Lu Lan also came upquietly afloat, no longer go back to the valley. Although the sun is still bright, but the pain is no longer the backbone of Sunburn people become, Kiyosumi, as if it was weak, and can not be distilled into a field, it is the field of reconciliation and the like; ... ... Autumn is here!

不知道从多久起，仿佛一场紧张的拼搏终于渐渐地透出了分晓，田野从它宽阔的胸膛里透过来一缕悠悠的气息，斜坡上和坝子上有如水一般的清明在散开，四下里的树木和庄稼也开始在微风里摇曳，树叶变得从容而宽余。露水回来了，在清晨和傍晚润湿了田埂，悄悄地挂上田间。露岚也来到了坝子上，静静地浮着，不再回到山谷里去。阳光虽然依旧明亮，却不再痛炙人的脊梁，变得宽怀、清澄，仿佛它终于乏力了，不能蒸融田野了，也就和田野和解了似的;……秋天来了!

秋天来了 Autumn Is Coming

It’s the middle ofSeptember now and the autumn has come. The hot days have gone. It’s cool in themorning and at night. It’s more comfortable than ever. But the weather is alittle bit dry, so we must drink more water. In the northern part ofChina, theleaves turn yellow and look beautiful, but in the south, there is little change.I love autumn very much because I like the scenery in the autumn.

现在是九月中旬，秋天就要到来了。炎热的日子已经过去了。秋天早晚比较凉快，比以往舒服。但是天气有点干燥，因此我们必须多喝水。在中国的北部，树叶开始变黄，看起来很漂亮；但是在南方变化不大。我很喜欢秋天因为我喜欢秋天的景色。

I think autumn is the most beautiful season in a year.The leaves turn yellow in autumn.I feel a little cool in the autumnal night.The trees were naked during autumn.

There is a breath of autumn in the air today.The weather in October was positively autumnal.I like to collect russet autumn leaves.We are enjoying the resplendent colors of the New England woods in the autumn.

Wake up to drink ,people feel the middle of the night, moving wind over a lot us leaf pond Life is so simple, such as the autumn, such as fallen leaves.That is an oil painting of a landscape in spring.

Autumn, with the joy of harvest, with a cool atmosphere, with golden feet, quietly came. Autumn of the field, is the golden ocean, is a symbol of harvest, is the peasants uncle years of effort. Full of hearty smile everywhere. It is no exaggeration to say that the autumn field is a sign of harvest, a tree, a red glowing apple, a yellow pear, a purple grape, a sweet pomegranate, a curved banana and sour grapefruit. The fruit you fight me to fight, just listen to "boom" is heard, with a dewdish big red glowing apple fell from the tree down. Pomegranate smile grinned his mouth, belly to break, and that a crystal, gem-like, shining dazzling fruit dripping honey, greedy a few children saliva DC. They seem to say to people, "Come on! Come! Come and try!"

The peasant uncle took the sickle and cut it hard. The growers climbed up the fruit trees and took the fruits one by one and put them in a big basket. Said: "This is really a good harvest this year!" "Yes! You look at this fruit, that applause!" "You see you see, how a grain of millet full, alas, if the weather every year, harvest Good year after year!

Autumn field really beautiful ah!

Autumn is my favourite season.I like it because autumn is so beautiful.

In the autumn,the weather is cool.There are lots of good things,fruits,crops,vegetables …and so on.Autumn is a harvest season,a golden season.

I like autumn because the Mid-Autumn festival is in it.This year the Mid-autumn festival is almost coming together with our National Day.I’m so happy and so excited,I can eat moon cakes again.I can receive the presents from my father,too.On this Mid-autumn festival,I will go hiking,I will eat moon cakes with my father and we can stay with my family.Oh,what a wonderful season!

In the golden season,we have begun the new term,I believe that I can get a good result.

I like autumn,what about you?

Perhaps autumn is the most pleasant season of the year. The weather is neither too hot nor too cold. It is the best time for going on a trip.

Last Sunday we went to the countryside. There was golden wheat all over the fields/The fields were covered with golden wheat. Large and colourful apples and pears were hanging on the trees. We could see some peasants were busy getting in the crops in the fields， and others were picking fruits under the trees. All the baskets were full of lovely fruits. It was also the fruit of the peasants labour. “ No pains， no gains. ” What a magnificent/beautiful picture(it was)! It seemed as if we were wandering in a splendid/wonderful world.

I love autumn. I love the harvest time.

也许秋天是一年中最宜人的季节。天气既不太热也不太冷。这是最好的时间去旅行。

上个星期天我们去了乡下。到处都是金色的小麦田里/地里满是金色的小麦。大,色彩鲜艳的苹果和梨挂在树上。我们可以看到一些农民正忙着在田里的农作物,和其他人挑选水果树下。所有的篮子都充满了可爱的水果。这也是农民劳动的果实。“没有痛苦,没有收益。“什么华丽的/漂亮的照片(这是)!好像我们徘徊在灿烂的/美好的世界。

我爱秋天。我爱收获时间。

Summer baby playful way to go, girl autumn is coming! She brought a lot of gifts!Autumn girl came to the fields, her fingers gently point, the magic happened! Become a golden field! Shore came the joy of aloe bloom, aloe open! Some full; some did not open; some only opened a little; some full up! Hush! Listen, leaves the baby left the branch, her arms and went back to the tree! Leaves baby, he flew side edge dance! From a distance it looked like a falling leaf butterfly dancing! Wow, vegetable fields can be a real buzz it! Cabbage like a princess wearing a gorgeous elegant dress! Lush green onions also can not wait to greet the arrival of autumn girl, they also put on a coat made of gold! Look, the grass also poked his head. Desperately put on golden clothes. Seen from a distance like a golden carpet! Clear streams as usual. However, some more noble gold and less elegant green. Moss Creek in autumn in order to welcome the arrival of the girl also wore a yellow skirt. The river fish shrimp are hiding. He seemed to play hide and seek girl and autumn too! Look, mom dandelion shore is bid farewell and children too! Because they must rely on the wind to her mother to travel with them too!Autumn field golden ocean, autumn fields are bustling world, the fall of the field is happy scenery. Why such a beautiful autumn? Autumn beauty is by the sweat of the farmers precious. Time return.

[英语秋天的作文

Autumn, like a naughty little child, he ran the East, West stroll, while you do not pay attention, gave the earth painted a colorful color.

He gave the woods yellow, red and green, gave the field gold, red, white, gave the orchard purple, red, yellow, but the autumn gave the most beautiful scenery to the garden.

If you are on the way to the garden, you can smell the flowers in ten miles away, that fragrance fragrant, refreshing, people feel relaxed and happy.

We look at the chrysanthemum it, it is red, purple, yellow ... ... they have some of the head blooming, and some shy shy answer, and some poured branches, some polite, welcome guests to the arrival of the Their most beautiful, the most elegant side for everyone to see. Osmanthus is not as bold as chrysanthemums, hiding in the lush foliage in the exudes of fragrant aroma, and some also secretly clawed leaves, peeking peoples actions. A cluster of sweet-scented osmanthus embrace together, like a golden ball, looks very beautiful.

I love chrysanthemum and sweet-scented osmanthus, love them proud of the spirit of pride.

Autumn weather is clear, breeze Xu to.

The flowers in the garden are colorful and colorful. There are lovely trumpet, like a small speaker. There are blood red roses, you see it red face, too cute! There are yellow tulips, smell a smell, really fragrant!

Here the grass color is different, there are dark green, light green, there are green and yellow and white. Suddenly a sudden wind blowing, flowers and grass like a bit of a singer, singing from the first wonderful march, really lively it!

These wonderful march, caused a group of small bees and dancing butterflies, they sing and dance, held a grand dance.

Autumn garden really beautiful!

All the year round, flowers in full bloom in spring, green trees, colorful summer, autumn fruit fragrance, is a winter with snow. Do you like spring? In the summer? Autumn? Or winter? But I like the autumn is fresh fruit fragrance.

Fall, although there is no spring so vibrant, so busy, no summer without winter so pure, so quiet, but it gave us the food and fruits, let us to live on earth.

Autumn, the paddy field a golden, like a golden sea, autumn wind blowing gently, gently stroked the golden rice, the rice as active children dressed in golden danced on the big stage, in a calm sea immediately once more the golden waves.

Autumn, the orchard emanate light fruit, the trees, big and small, yellow pear on the branches shook his body, as if to say: "we are mature, pick me first!" Another one said, "pick me to first!" "Pick me first!" "Pick me first!" ...... Pear quarrelled twittering in the branches. Look at the apple more lovely, waiting quietly on the branches of the farmer uncle to pick them, the farmer uncle came, and said: "these apples are big and round, it must be very delicious!" The apple listened to farmer uncle praise, very embarrassed, like a timid girl, face was red with shame. Gold and silver crystalclear grapes hanging on the fence, mouth water as soon as you see, of course, me too...

Which season do you like? I like the lovely and beautiful autumn.

一年四季，有鲜花盛开的春天，有绿树成阴的夏天，有鲜果飘香的秋天，有白雪一片的冬天。你喜欢春天?夏天?秋天?还是冬天?不过我喜欢的是鲜果飘香的秋天。

秋天，虽然没有春天那么生机勃勃，没有夏天那么热闹，没有冬天那么纯洁，那么安静，但它给我们带来了粮食和水果，让我们可以在人间生活。

秋天，稻田里一片金黄，像一片金色的海洋，秋风轻轻吹过，轻轻地抚摸了一下金色的稻子，稻子们像活泼的孩子穿着金色衣服在大舞台上跳舞，风平浪静的海洋马上荡起了金色的浪涛。

秋天，果园里发散出淡淡的果香，树上的大大小小的，黄色梨在枝头上摇着身子，好像在说：“我们成熟了，先摘我吧!”另一个说：“先摘我才对!”“先摘我!”“先摘我!”……梨在枝头上叽叽喳喳的吵了起来。看那苹果多乖，在枝上静静的等着农民伯伯们来摘她们，农民伯伯们来了，说：“这些苹果又大又圆，一定很好吃!”苹果们听了农民伯伯夸赞，很不好意思，像羞答答的小姑娘，脸都羞红了。一串串金银剔透的葡萄挂在篱笆上，你一看就直流口水，当然，我也是的……

你喜欢什么季节呢?我喜欢的是可爱又漂亮的秋天。

Autumn, although not as bright as the flowers in the spring, has so many bright colors, but it uses its own unique golden yellow to attract people.

You see, the leaves are like a golden butterfly, fly, fly, bring the autumn scenery. When autumn comes, I will put their eyes on the tree, see the tree leaves turn yellow, although a riotous with colour the flowers have withered, but open: Red chrysanthemum fall over each other, pale green, with purple red......

Nature is so magical, I love autumn, more love nature.

Why do leaves change color in the fall? asks Patricia Brown, of New York City.

Autumns cool days are trimmed with deep blue skies and golden light, and brilliant leaves of yellow, orange and red. Leaves changing color in the fall are a trees way of preparing for long winter, rather like we put up storm windows and pull warm clothes and blankets out of storage.

In summer, the leaves on trees like pin oaks and sugar maples are green because they are chock-full of the green pigment chlorophyll.

Trees need sunlight to produce chlorophyll. In turn, chlorophyll uses sunlights energy to split water (H2O) into hydrogen and oxygen. Meanwhile, leaves also absorb carbon dioxide gas from the air. The end products of leaf chemistry: carbohydrates (homemade plant food for the tree), and oxygen, released into the air (the gas we need to breathe). The whole process is called photosynthesis.

Along with green chlorophyll, most leaves also contain yellow, orange and red-orange pigments celled carotenoids. Trees dont need light to make carotenoids. Botanists call them "helper pigments," because carotenoids absorb some sunlight and (nicely) pass the energy along to chlorophyll. We dont see much of these deputy pigments (carotene, lycopene, and xanthophyll) in summer, because they are masked by abundant green chlorophyll.

But the ever-shortening days of fall mean less daylight and colder weather. The average tree is rushing to save all the nutrients it can for its winter hibernation. Nitrogen and phosphorus are pulled from leaves for storage in branches. A layer of corky cells grows between the leaves stems and their branches, reducing the leaves supply of nutrients and water.

With diminished sunlight, water, and nutrients, chlorophyll synthesis slows. Old, worn-out chlorophyll breaks down at the usual rate--ironically, sunlight destroys it--so each leafs stock gradually dwindles. And as the green fades, yellow and orange emerge from hiding.

Unlike the green and yellow pigments, red and purple pigments (anthocyanins, part of the flavonoid class) actually form in leaves in the autumn, tinting leaves scarlet and burgundy.

Botanists have long wondered why some trees are genetically programmed to manufacture anthocyanins in the fall. New research indicates that anthocyanins may be a trees own sunscreen.

Anthocyanins are made in a leafs sugary sap, with the help of lots of sun and cool temperatures. Botanists think that anthocyanins shield the leaves fading photosynthesis factories from too much sunlight, rather like the pigment melanin protects our skin from the sun. While the red pigments act as a shield, the tree feverishly breaks down and pulls nutrients out of leaves and into its limbs and trunk before leaves drop or die.

Anthocyanins may also act like Vitamin C or E, scavenging so-called "free radicals" before they can do oxidizing damage to a fall leafs fragile structure.

Upper and outer leaves tend to be reddest, since they are most exposed to sunlight and cold. In some trees, like sugar maples, the reds of the anthocyanins combined with the yellows of the carotenoids make especially brilliant orange leaves.

[经典英语作文：秋天叶子为什么会变颜色

It gradually turns cool. The sunlight is no longer so strong and the

cicadas have stopped crying. The hot summer went by at last. The favorite season

in the year is coming.

Everywhere we can see the scene of bumper crops: on the fields is golden

rice,on the trees are ripe fruits. The farmers faces are full of smiles. They

are now expecting a good harvest through a summers hard work.

The autumn evening is especially beautiful. When the setting sun goes

slowly down to the west, the sky over the mountains is covered with red rays of

evening sunlight, which shines upon the blue sky and floating clouds, just as

the maple leaves fall onto the sky.

It is getting cool at dusk. The wind blows, the moonlight shines on the

ground,the frogs croak and insects chirp in the fields. Such a situation will

make you forget all the unhappy things in the daytime.

I love the beautiful season.

Its September. Autumn is coming.But where is autumn?I am told that the sky looks higher with few clouds in autumn.I raise my head and look at the sky. It makes no difference with the sky in summer.And trees around are still green.Then I come to the fields. I find the corn in the ear. Apple trees nearby are fruiting well.The harvest season is coming.I jumped with joy. This is autumn. I found it!

九月，秋天来了。可秋天在哪里呢?人们经常说，秋天天高云淡。树叶都凋零了，一片萧条的景象。我抬起头，望望天，天空并没有什么变化。树叶仍绿油油的。于是我来到田野，我发现玉米已经抽穗了，附近的苹果树硕果累累。收获的季节来临了。