英语高中话题作文（精彩20篇）

人，真的很聪明吗?

人类从亘古的荒原走来。一直走到高楼林立的都市：人类从愚昧落后的部落走来，一直走到文明和开化的现代社会。这一路高歌猛进，无不说明人类是这个世界上最聪明的生物，不愧为“宇宙之精华，万物之灵长”。近几百年来，人类的聪明才智更是发挥到了极致：蒸汽机、电、核能……这一切的一切，不断显示着人类的智慧和力量。然而。仅凭这些。就能断言人类是最聪明的吗?就能判定现在的世界优于过去，并预测未来的世界一定更美好吗?

我的回答是：不能!

仰望天空。候鸟凄厉的叫声，带来远方战火依然的消息：驰骋高原，再难见到藏羚羊奔跑的矫健身姿……这一切，又是谁造下的孽?

大量的事实告诉我们，有许多人只受到功利的影响。而没有接受智慧的启蒙。近代的战争多数已不单纯为了正义，的是为了物欲和私利。这充分暴露出人性中贪婪、自私和暴戾的一面。有些国家为了不可告人的目的，使用贫铀弹等杀人武器，丝毫不顾对环境的破坏，导致受难地区的无奉百姓患癌症等疾病的比例大幅度上升。这不仅仅是愚蠢，更是道德的沦丧，是彻头彻尾的犯罪。还有，由于人类无节制地向大自然掠夺索取，致使环境日益恶化。生物种类大幅度减少。

300亿年前地球上大约有25亿个物种，现在仅存1亿个左右。在已灭绝的约24亿个物种中，有60%是20世纪灭绝的。从17世纪起，动物的灭绝进入了加速时期。据联合国环境规划署统计，现在仅存的约1亿个物种中，鸟类每两年灭绝1种，兽类每一年就灭绝1种。今后的趋势是：植物可能以每小时1种的速度灭绝，动物可能每天减少1种。我不禁想问，仅有的这些物种在地球上还能支撑多久?

大海雀、渡渡鸟、旅鸽、卡罗莱纳鹦鹉、高加索野牛……这些早已被人类灭绝的动物，如果能够复活的话，我们从它们眼中看到的将是平和、善意，还是愤怒与敌意?事实上，现在连看一看敌意的目光也成了一种无法实现的奢望。

人类只是地球生命之网上的一段绳索，人类施之于这“网”的，也是人类施之于自己的。人类的文明已经让这张“网”变得千疮百孔。人类用科技来防止小行星将地球“咬”出一个缺口，是聪明的，但自己将这张生命之“网”撕扯得破败不堪。那就不能不说是糊涂之极了。也许有时残缺是一种美，但对整个地球生态环境来说，残缺决不是美!我们需要一个完整而美好的地球。造物主给了人类一个美丽的星球，人类应该怀着感恩的心与地球和谐相处。

21世纪的钟声早已敲响。可我们是否应该将20世纪乃至前几个世纪人类的所作所为放在一架一头是聪明另一头是愚蠢的天平上称一下，看看哪一头会更重?或许，对于未来世界而言，这样做能使我们免生许多遗憾。

成长，就像厚重的夜幕拦不住闪烁的群星，闪烁的群星拦不住你心灵窗外耀眼的阳光;成长，就像朗朗的晴空拦不住突来的暴雨，突来的暴雨拦不住你渐已远去的坚毅背影;成长，就像沉静的秋夜拦不住凄冷的北风，凄冷的北风拦不住你走向春天的稳健脚步。 Growing, just like a heavy night cant stop the flashing stars, the flashing stars cant stop the dazzling sunshine outside your heart window;Cant live a sudden rainstorm, the sudden rainstorm cant stop you from getting far away; growing, just like the quiet autumn night cant stop the cold north wind, the cold north wind cant stop you walking to the springSteady.

而在成长的路上，人生必修课就是尝试，所以人都是在尝试中成长的!这些就是我所领悟到的。

我的尝试是几年前的音乐培养班拉开序幕的。音乐培养班刚举办，我就去“捧场”。我大概学了四年左右的音乐。其中学习的技巧有一项叫做“花舌”，它的意思就是说嘴里用气流冲击翘起的舌头，使之滚动产生的碎音效果，民间一般称为“打嘟噜”。当时是“一对一”的课程，不爱说话，老师让我“打嘟噜”我就不打。后来老师让我回家练习，我练习了很多次，可就是不会。于是，我每天走路、上课都会练习。终于“皇天不负有心人”我回家边走边练习。不一会儿有了一点感觉，渐渐地，我练得越来越熟，老师也夸我不止。可是现在，也忘得差不多了!

呵呵，即便不成功，只要肯努力，肯尝试，就一定能够收获。所以说：不管我们心态如何，反正时间永不会等候你，世界永不会可怜你。来!向生活发出挑战，让尝试在成长中无处不在!

在初中，我读过莫顿·亨特的文章，他的父亲用“走一步，再走一步”鼓励亨特战胜了恐惧，战胜了自己，走下悬崖。我觉得：无论是谁，都需要如此：循环渐进，在尝试中成长，用心成长。

在人生之路上，我们有很多个第一次，而我们的每一个第一次就是尝试。

Barack Obama who is the first black president in America will finish his last term of office soon. He is going to move away the White House and relieve his job as president. I still remember the time when Obama won the election and gave his inspiring speech, he said he wanted to make some changes to America.

Now 8 years have passed, his words have been tested.

Some people think he is a good president even though they don’t think what Obama brought to the country did not make a big difference.

But no one will deny that Obama is very humorous, it is known to all that he likes to watch the TV series. He keeps his eyes on them and sometimes he will play jokes in his personal Facebook. During his last term, he joined the talk show and showed his humor.

美国历史上第一位黑人总统巴拉克奥巴马很快就会完成他的最后任期。

他将离开白宫和卸下他作为总统的工作。我还记得当年奥巴马赢得大选, 发表了鼓舞人心的演讲,他说他想给给美国带来一些改变。

现在8年过去了,他的话会得到检验。有些人认为他是一个好总统,即使他们并不认为奥巴马给国家带来很大的影响。

但没有人会否认,奥巴马很幽默,众所周知,他喜欢看电视连续剧。他一直关注着美剧,有时他会在他的个人脸谱账号上玩笑。在他最后的任期里,他还参加了谈话节目,展示了他的幽默。

[高中英语作文：奥巴马的最后任职期限

导语：我们都爱自己的国家，为成为一名中国人而骄傲，下面是yuwenmi小编为大家整理的有关爱国英语作文，欢迎阅读与借鉴，谢谢!

It is the duty of every citizen to make the country rich and powerful (to make the country rich and strong is...). in order to accomplish this object one must be patriotic (love his country). i consider this an unchangeable truth.

How can a student love his country (be patriotic)? i find my answer very simple and clear. he must study hard and store up knowledge so as to serve his (the) country in the future. if every student can do according to what i said, the country will certainly be rich and powerful.

【参考译文】

要使国家富强是每个公民的责任。为了达到此目的，必须爱国。我认为这是一条不易的定理。

一个学生如何才能爱国呢?我发觉答复很简单明了。他必须用功读书并积储知识以便将来服务国家。如果每个学生能按照我所说的去做，国家一定会富强。

The cartoon vividly reveals the phenomenon of air pollution or the decline of air quality. What exactly contribute to this phenomenon? Possible reasons can be listed as follows: firstly, vehicle exhaust gases could be one of the most leading causes. With the improvement of economy and peoples living standard, urban inhabitants in mounting numbers own their private cars. More automobiles will inevitably generate more exhaust gases. Additionally, household appliances widely used in cities also release a great mount of carbon dioxide gases, which further intensifies air pollution. Last but not least, many factories around the cities emit large quantities of untreated poisonous gases, which should also be responsible for the decline of air quality.

Definitely, air pollution will exert a detrimental impact on many aspects of peoples life. For example, many diseases such as cough, skin problem and lang cancer are caused by it. Perhaps it is high time that we should adopt some measures to solve the problem of air pollution.

参考译文：

此图生动地揭示了空气污染和空气质量下降的现象。到底是什么导致了这个现象?可能的理由罗列如下：首先，机动车的尾气排放是最主要的原因之一。随着经济的发展和人们生活水平的提高，越来越多的城市居民都拥有了自己的汽车，而更多地汽车势必带来大量的尾气排放。其次，城市里广泛使用的家用电器排放了大量的二氧化碳，这也进一步加剧了空气污染。最后，城市周边的很多的工厂，也每天向空气中排放大量的未经处理的有毒气体,这也导致了空气质量的下降。

[以环境与资源话题英语作文及参考译文

A group of penguins at a zoo in Japan take a walk to lose weight. Every day, 15 king penguins there walk 500 meters twice. "Just like human, penguins dont exercise much during winter. They become fat easily," says a zookeeper.

在日本的一个动物园里一群企鹅在散步减肥。哪里的15只金企鹅媒体散步两次，每次500米。 动物园工作人员说：“和人类一样，企鹅冬天不怎么运动，容易发胖。”

人们的梦想来源于希望，生活的美好憧憬也是人们希望的一种体现，太阳升起，为人们带来生存和对新的一天带来的企盼与希望。

在现在的生活中，人们有很多的希望寄于工作、生活、学习或其它方面，但希望只是希望，他们缺乏真正去实践、为目标、梦想和希望去努力的动力。

缺乏动力意味着希望在最终会变化为失望。要想将希望变为现实，就不能仅仅是抱有希望而不行动。

播种下行动，让它开花结果，对它细心呵护，给予它充足的阳光和水分。将播种下的行动坚持下去。当你觉得枯燥、无法继续坚持下去的时候，请你回过头，看看你走过的路，展望未来，看你许下的愿望、未来的梦想，放下你的不快与疲惫，继续充满斗志与活力，走下去。当你已经到达坚持的终点，你会收获一种习惯，并对习惯产生一种渴望和追求。

播种下的行动，收获的是习惯的种子。请你将你的习惯播种下去，去实践，去改变你的不足，为了你的希望、梦想。当习惯的种子已长成参天大树，开满香花，请不要就此放弃。这像是天边的彩虹，当彩虹越过云雨，阳光越过彩虹最暗的那道颜色，你会发现，彩虹会更接近云雾顶上的太阳。这个收获，会让你收获一种命运，得到希望的种子。

请你将最初的希望、梦想寄予你的收获。请你将希望播种，接受人生的洗礼，找到人生路上的导航标。请你将希望播种，希望将会永无止境的为你带来快乐，实现最初的梦想。

My name is zhangyifan, this year 15-year-old boy, my special features is writing.I am an introverted person, very happy can spend a junior high school with everyone .I hope in the future day can spend amusedly with everyone for three years, increasing a perfect but substantial recollection for our lifes!

In my opinion, the movie “ the pursuit of happyness “ is a meaningful film,

the hero of the movie is an active man. Though his life was very hard, his wife

left because of the situation of their family.His work was also unfortunate. He

never gave up and still work hard.Then he took care of his little son. He is

going after happiness all the time, so his life is running . Time is very

importmant to him, he must finish his task on time , or he wouldnt live a

steady life , he has to pay the rent and taxes and so on, but he insist on

taking every chance to make his life live better and he believe in himself.

Finally, he succeed , his part of life in the movie is moving and real.

I also like the song in the movie very much, it says “ the mountains have

high places and low places ……”

Everyone has a dream, if you work as hard as the hero of the movie , your

dream will come ture, so I will learn from the hero ---Chris Gardner.

And I believe my dream isn’t far away!

There are many important people have been in my life, and one of them I will never forget. I met him last summer. He was short and tanned, and was about twelve years old. He was selling the balloons on the sideway when I met him, I was curious and asked him:” why do you do business at such young age?” he said:” I’m not doing business, I have been saving money. I want to donate it to the disaster area, the children there need help.” I was surprise, and ashamed. I bought many balloons from him and asked him to keep the change. I should learn from him to be a kind-hearted person.

在我的生命中出现过很多重要的人，其中有一个非常难忘。我是在去年夏天的时候遇见他的。他个子很矮，皮肤黝黑，比我年纪还小。我遇见他时他正在路边卖气球，我非常好奇就问他：“你为什么年纪那么小就做生意了?”他回答说：“我不是在做生意，我正在存钱。我想把钱捐到灾区，那里的孩子们需要帮助。”我感到很惊讶，也很惭愧。我向他买了许多气球，不用找零。我应该像他学习，做个有爱心的人。

选修课(Selective Courses) This term our school laid down a new rule about selective court. For the first two weeks, we may sit in as many classes as we like before we decide on which courses to choose. We jumped for joy. The first week I attended classes for four evenings on end and found out that most of the teachers took it serioualy. They were busy in "winning votes" for fear, that later on no one would attend their lectures.

For example, the teacher of Modern Literature of Taiwan said, "Actually the flrst two hours of my lecture were only a prelude. The real contents have not been involved. In the furore, we shall discuss such famous writers as Qiong Yao, Xi Murong, etc, and such famous aetresses as Lin Fengjiao, Lin Qingxia etc. We have lots of vedio-taped films to watch. These are confined only to those who co-major in this court." See, after all, the last sentence is the core of everything he said.

The teacher of Appreciation and Critics of Modern Opera said, "We have a variety of contents and the teaching method is changable. For instance, l may choose one act from a play and let you perform it in class. If you do a good job, you can put on the play at the school theater festival. Also, we shall arrange for you to watch current plays. The school is in charge of the traffic and tickets, Of course, only those who co-major this course are eligible." You see, the most important thing comes at last through twists and turns.

[新年计划初中英语作文三篇

“我终于做出了这个决定。别人说什么我都不在乎。只要你同样有把握，我愿意陪你走到天涯海角“听梁静茹的《勇气》让我想起了过去。

初三的时候，我是一个胆小的小女孩。我上课从来不敢回答老师的问题，怕我答错了老师会批评我。我从来没有勇气回答老师的问题。我没有勇气参加学校的活动。

初三下学期，我们班有一个公开课，老师提出了一个很简单的问题。班里很多同学举手，甚至成绩比我差很多的同学也举手说:“我拿到了，我拿到了。“我环顾四周，但没有举手。

下课后，老师把我叫到办公室，对我说:“心一，今天班里好多同学都举手了，你却没有举手。老师感到非常失望。希望你下次上课举手。““我怕我答错了你会批评我。““不要害怕。勇敢点。打错了也没关系。老师相信你。“

晚上，我躺在床上，辗转反侧都睡不着。想着老师说的话，我听到梁静茹的“勇气”在我邻居家演奏。我想了想，觉得应该鼓起勇气回答老师的问题。

第二天，在课堂上，老师提出了一个难题，班上没有一个学生举手。老师说:“是不是没有同学敢回答这个问题？“说着，眼睛看向我的方向。我立刻举手，老师叫我名字，我立刻把想法说出来。老师表扬我:“新一的同学做的很好，希望大家可以向她学习。同时也希望新一的同学能坚持这份勇气。“

后来每当老师每节课提问，我都是正面回答。后来，我也积极参加了学校的活动，尤其是艺术节活动。三年级的时候，我成了学校里有名的童星。

直到现在，我仍然积极参加学校活动。目前是学校文学社编辑组成员，曾获星光技能大赛硬笔书法三等奖。虽然没有进过市级比赛，但还是挺满意的。

回想一下，历史上很多名人，比如海伦·凯勒，19个月就失明了，然后又失聪了。但是海伦·凯勒并没有失去勇气。后来，在安妮&米德多；在沙利文的教育下，她学会了说话，最后考上了大学。再比如张海迪，她5岁时因脊髓疾病导致高位截瘫，但并没有丧失勇气。虽然她没有机会走进校园，但她努力学习，完成了小学和初中的所有课程。

所以，勇气很重要。

导语：随着人们生活水平的提高，私家车数量不断增加。下面是yuwenmi小编为大家整理的优秀英语作文，欢迎阅读与借鉴，谢谢!

Private cars have become an important aspect of people‘s life in many parts of our country, especially in large cities such as Beijing, Shanghai and Guangzhou. While they bring much convenience to people, they are also widely criticized. There are some arguments for owning private cars. In the first place, cars allow people to move around freely, which greatly improves our living standard. We can easily drive cars for sightseeing on weekends. In the second place, cars are a comfortable way to travel, especially in bad weather. Last but not least, the car industry can boost economy by creating many job opportunities in production of steel, rubber, glass and so on. However, there are also many good arguments against cars. First of all, they pollute the environment by emitting harmful gases and giving out loud noises. In addition, cars cause a large number of traffic accidents, which bring great misery to the victims‘ families. As far as I am concerned, we should limit the number of private cars by providing better mass transportation and better service for the people. Everyone should sacrifice his or her own interest for the common good of the society.

【参考译文】

私家车已成为我国许多地区人民生活的一个重要方面，特别是在北京、上海和中国等大城市。虽然他们给人们带来很多方便，但他们也被广泛批评。有一些理由拥有私家车。首先，汽车可以让人们自由走动，这大大提高了我们的生活水平。周末我们可以很容易地开车观光。其次，汽车是一种舒适的旅行方式，尤其是在恶劣的天气里。最后但并非最不重要的是，汽车工业可以通过创造钢铁、橡胶、玻璃等的就业机会来提振经济。然而，也有许多好论据反对汽车。首先，他们通过排放有害气体和发出大声的噪音来污染环境。此外，汽车造成了大量的交通事故，给遇难者家属带来了极大的痛苦。就我而言，我们应该通过提供更好的大众运输和更好的服务来限制私家车的数量。为了社会的共同利益，每个人都应该牺牲自己的利益。

导语：快餐的发展很快，因为它是经济，方便，有各种各样的食物，满足不同口味。它将在未来变得越来越流行。下面是yuwenmi小编为大家整理的优秀英语作文，欢迎阅读与借鉴，谢谢!

Fast food is becoming more and more popular in China,especially among children and teenagers.Today,nothing is more representative of the fast pace of modern society than fast food.There are several reasons for its popularity.First,it is quick and convenient.Go into a fast food restaurant,and your food will be ready in a minute.You can satisfy your hunger instantly.Precious time wont be wasted in waiting-in-line to order or waiting at your table for your food to arrive.Second,its popularity is also attributed to the clean food,the excellent service and the comfortable environment of the fast food restaurant.

However,I think that fast food isnt healthy enough because it does not compose a balanced diet and is low in nutrition.Doctors suggest that people should avoid eating too much fast food.Although home cooking is time-consuming and following washing-u p tiresome,it offers healthy and delicious meals your body likes and needs.Fast food I s only a good choice when you are in a hurry and we should turn to it only once in awhile.

【参考译文】

快餐在中国变得越来越流行，尤其是儿童和青少年。今天，没有什么更多的比快餐快节奏的现代社会的代表，它的流行有几个原因。首先，它是快速和方便。走进快餐店，和你的食物将在一分钟准备好。你可以立刻满足饥饿。宝贵的时间不会在网上订购或在您的表为您的食物到达等待浪费。其次，它的知名度也归因于清洁食品，优良的服务和舒适的环境的快餐店。

不过，我认为快餐是不健康的足够的因为它不构成一个平衡的饮食和低营养。医生建议人们应该避免吃太多的快餐。虽然家里烹饪费时以下洗眉p讨厌，它提供了健康和美味的餐你的身体喜欢和需要。快餐i一个很好的选择只有当你在赶时间，我们要把它在一段时间只有一次。

花开花谢，春去秋来。不经意间，我慢慢长大了。回首逝去的岁月，爸爸是最让我感激的人，他细致入微的照顾，严厉中善意的批评，使我成长，让我难忘。

记得那时我上五年级，因为感冒没有及时治疗，加重了病情，发展成肺炎，并不断高烧，最高时超过39度。在医生诊断后，决定给我输液。很晚我才开始输液，看着五百毫升的药罐，我恨不得一口把它喝了。药一滴一滴缓缓滴着，时间已经很晚了。我的困意覆盖了肺部的疼痛，靠在一旁渐渐睡去。也不知过了多久，我从睡梦中醒来，发现身上盖着爸爸的大衣，头下还枕着他的手，而爸爸则以非常难受的姿势坐在旁边。我又看见爸爸满眼的血丝，就知道他肯定强忍住睡意，在一旁坚持守着我，生怕我一动碰掉针头。这时，爸爸轻声问我：“醒啦，再睡会吧，明天还要上课呢。”我回答：“没事的，爸，你也睡会吧。再说，你穿着这么单薄的衣服，多冷啊。大衣你穿吧。”“没事，我身体好。你多盖点，要不病更不爱好”爸爸赶紧说。我软硬兼施，强迫爸爸休息。最终在我的劝告下，爸爸进入了梦乡。看着熟睡的爸爸，我的眼睛湿润了，爸爸为我付出了多少啊！为了不耽误学习，这样连着输液几个晚上，病情却仍旧不见好转，嗓子疼得厉害，只能不断喝水。每天夜里爸爸都得不断地给我打水，跑进跑出，还不能休息，总是把他累得筋疲力尽，但他毫无怨言。这就是父爱啊！

我的爸爸不仅是一位“慈父”，还是一位“严父”。他对我的学习要求十分严格，没有丝毫放松。有一次，我向爸爸请教一个数学题，爸爸却让我自己思考。我费尽心思，没有任何进展。时间一分一秒过去，看着爸爸严肃的表情，心里又急躁又害怕。生怕自己做不出答案，遭到严厉的训斥。终于，我用一种复杂的方法解答了这道题。父亲见了，一皱眉，生气的说道：“这么半天才做出来，太慢了！这种方式太麻烦，你用别的方法试试。”我又动起笔用另一种方式计算了起来。不一会，这道题就迎刃而解了。爸爸见了，并不高兴，拿起笔又教我一种更简洁的办法。爸爸严厉的眼神看着我，说：“你难道没想到用这一种方法吗？现在重做一遍！”我按照爸爸的方法又做了一遍，这次比前两次都快，而且步骤一清二楚。我终于明白爸爸宁可让我熬夜，也要做题的原因。他为了让我扩展思路，宁可陪我熬夜。这是另一种父爱。

爸爸的严厉使我学到无穷的知识，爸爸的慈爱给我无穷的快乐。父爱是每个人必不可少的东西，既然拥有就应该珍惜。爸爸为我付出了许多，长大后我一定要报答他，尽一份孝道。更要想到，报答除了有出息还有关心，不必等到长大，地球上你就这一个爸爸，不可再生资源，不要剥夺爸爸享受子爱的时间。看看毕淑敏的《孝心无价》就有紧迫感了……呵呵。

My Experience In Examination

In my opinion, examinations are one of the important activities in school life. I have gone through all sorts of examinations since my primary school. I have tasted the flavor of happiness and sadness.

Before examinations I always have a hard time and don＇t know what to do.During examinations I feel nervous and sometimes my mind becomes blank Only after examinations does the world seem to be bright again and am I brimming with vigor. We often complain that our teachers make trouble for us on purpose. But it is not true. The fact is that examinations are just a way to-help us do better in our study.

[高中英语的作文：我的考试经验

There is a saying that man proposes, goddisposes, which means man plan the things and the rest of the outcome lies inthe luck.

This saying reflects the connection between hard-work and luck, whichis though sometimes we have worked so hard, luck occupies great position, theunexpected things happen and refrain us from succeeding.

In order to besuccessful, people work so hard, they believe they can achieve their goals, butlacking luck stops them achieving their goals.

So working hard doesn’t meanbringing people success directly, they just need to try more times, withoutluck, they still can make their goals. Luck can help people close to success,without hard-work, they can’t be successful. Hard-work and luck make peoplerealize their goals, but without luck, people still can make it by trying moretimes.

有一句话说谋事在人，成事在天，意思是人们计划事情，剩下的结果依赖于运气。这句话反应了努力和运气之间的联系，那就是虽然有时候我们很努力工作，但是运气也占据了很重要的位置，意外的事情会发生，阻挡人们成功。为了取得成功，人们努力工作，他们相信能达到目标，但是运气的缺失让他们无法达到自己的目标。因此努力并不意味着能直接给人们带来成功，他们需要多试几次，没有运气，人们仍然可以达到目标。运气帮助人们接近成功，没有努力付出，无法成功。努力和运气能让人们实现目标，但是没有运气，人们多尝试几次，也能终将办到。

[高中英语作文：努力和运气

Dear Tim,

With Spring Festival drawing near, I’d like to invite you to my home to experience the festival.

When you come, we can enjoy traditional Chinese food together, and then put up Spring Festival couplets. As a traditional custom, the couplets are always posted on the door of a house. Written on red paper, a couplet is composed of two lines of poetry, which rhyme with each other. Not only do the couplets add some joyous atmosphere to the festival, but also they express people’s wishes for a better life.

I would appreciate it if you could accept my invitation. Looking forward to your coming.

Yours,

Li Hua

After I go to school, teachers always tell me to study hard, so that I can

be the excellent student. But now I have grown up, I have my own idea. The

reason for me to study hard is to return my parents’ love. When they are old, I

can make a lot of money and let them have a better life.

Oceans becoming more acidicThe worlds oceans are slowly getting more acidic, say scientists.The researchers from California say the change is taking place in response to higher levels of carbon dioxide in the atmosphere.The lowering of the waters pH value is not great at the moment but could pose a serious threat to current marine life if it continues, they warn.Ken Caldeira and Michael Wickett, from the Lawrence Livermore National Laboratory, report their concerns in the journal Nature.Increasing use of fossil fuels means more carbon dioxide is going into the air, and most of it will eventually be absorbed by seawater.

Once in the water, it reacts to form carbonic acid.Scientists believe that the oceans have already become slightly more acidic over the last century.But these researchers have tried to predict what will happen in the future by combining what we know about the history of the oceans with computer models of climate change."This level of acidity will get much more extreme in the future if we continue releasing CO2 into the atmosphere," said Dr Caldeira."And we predicted amounts of future acidity that exceed anything we saw over the last several hundred million years, apart from perhaps after rare catastrophic events such as asteroid impacts."If carbon dioxide release continues unabated, ocean pH could be reduced by as much as 0.77 units, the authors warn.It is not absolutely clear what that means for marine life, however.

Most organisms live near the surface, where the greatest pH change would be expected to occur, but deep-ocean lifeforms may be more sensitive to pH changes.Coral reefs and other organisms whose skeletons or shells contain calcium carbonate may be particularly affected, the team speculate. They could find it much more difficult to build these structures in water with a lower pH.In recent years some people have suggested deliberately storing carbon dioxide from power stations in the deep ocean as a way of curbing global warming.But Dr Caldeira said that such a strategy should now be re-considered."Previously, most experts had looked at ocean absorption of carbon dioxide as a good thing - because in releasing CO2 into the atmosphere we warm the planet; and when CO2 is absorbed by the ocean, it reduces the amount of greenhouse warming.

风越刮越大，狂风卷着黄沙打到一棵小树上，把小树吹得东摇西晃。在魔鬼般的黄沙中，隐隐约约能看到树枝间挂着一张被吹破了的蜘蛛网，也随着树枝摇来摇去。夏洛抱着一根结实的蛛丝，倒吸了一口凉气：“天哪！快让这可怕的大风停住吧！”可是风似乎就是想跟他作对似的，不但没停，还刮来了一股更加强烈的大风，让没有任何防备的夏洛来了个“空中飞蛛”，吓得他赶紧闭上了双眼。

前几天，在夏洛的家里，他的妈妈语重心长地对他说：“夏洛啊，你也不小了，也该到外面闯闯了。去吧，外面的世界大着呢！用我教给你的那些知识，去创造一个属于你自己的家吧！”“放心吧，我会照顾好自己的！”夏洛走到门口，回过头，热泪盈眶地说道，“再见！”于是，在这天清晨，夏洛来到了这棵小树，开始织网。没想到出师不利，网刚织了一半，就刮起了一场大风，出现了开头的那一幕。渐渐地，风停了，天晴了，空中飘着几朵白云。夏洛抖抖身上的尘土，重新开始织网。

只见他先爬到最高的那根树枝上，吐出一根又粗又结实的蛛丝，拉到下面的树枝上，接着又吐出一根和前一根一样的丝，“嗖”地跳到对面的那根树枝上，搭成了一个十字形骨架，然后他又吐出一根结实的蛛丝，把自己固定在树枝上，沿着骨架一圈一圈地向外织。

就这样，夏洛不停地织呀织呀，眼看着就要成功了，突然乌云密布，电闪雷鸣，豆大的雨点儿伴随着狂风向夏洛袭来。夏洛只好躲在树枝下面，眼睁睁地看着自己辛辛苦苦织出的网被风雨撕裂。小树被利剑似的雨点打弯了腰，无力地耷拉着脑袋。夏洛看看小树，又看看自己的那已经支离破碎的蜘蛛网，心疼极了。他的眼泪不由自主地流了下来，心想：唉！我怎么这么倒霉呀！早知道会这样我就不织了，害得我白费了这么多力气。

要不……我别织了，省得再白费力气。夏洛犹豫了，因为他的心里闪过一个信念。“对！阳光总在风雨后！”夏洛喊了起来，“我一定要坚强，因为只有风雨过后才能看到最灿烂的阳光！”过了一会儿，暴风雨停了，树上那小小的身影又开始忙碌起来。天边的夕阳映在蛛丝上，反射着五彩的光。

第二天清晨，当第一缕阳光射出地平线的时候，一张崭新的、漂亮的大网出现在那棵小树上。一颗颗晶莹的露珠挂在上面，就像一条美丽的珍珠项链，在金色阳光的衬托下，显得更美了。