保护水的英语作文80词（合集20篇）

Water Is Important

We live in a world which is surrounded by the water, we need to take in water every day, without water, no one can live for a longtime. Some people even die of lacking water, so water is very important. We should not waste water, we can use it in recycle. Wealso need to drink more water, so we can keep healthy.

【翻译】：

水很重要

我们生活在一个被谁环绕的世界，我们需要每天摄入水分份，没有水，没有人可以长时间的生存。一些人甚至死于缺水，所以水是很重要的。我们不应该浪费水，可以循环使用。我们也需要多喝水，这样才能保持健康。

有的人认为地球上的水是怎么也用不完的，因为在他们的眼里地球上到处是江河湖海，还有那数也数不清的山间小溪，水是铺天盖地的。实际上根本不是这样，地球上的水是有限的，如果我们现在不注意节约水资源，保护水环境，那么总有一天会用完的。

我们江南水乡，本来河多水多，山清水秀，可是现在有些人不懂得保护水环境，把生活垃圾一股脑儿扔进江河湖泊，还有许多工厂把工业污水也都排进了江河湖泊，大量的水资源被严重污染，使碧水变得臭不可闻，导致人类赖以生存的净水越来越缺乏，水的危机已经向人类敲响了警钟!

谁都知道，人要水，树要水，世间万物都要水，一旦没有了水，一切生物都会失去生命，所以我们从现在开始必须节约水资源，节约每一滴水。

节约水资源就是要尽量发挥每一滴水的作用。比如随手关紧水龙头，大小便后尽量不开大水冲，利用洗衣水冲马桶，将淘米水浇花等等。同时还要保护水环境，要从我做起，从现在做起，不向河里乱扔垃圾。要处理好工业废水，绝不让它流进江河湖泊，让江河湖泊之水永远洁净，造福人类。

水是生命是源，更是生命之本。我们要珍惜每一滴水。

导语：地球上的水并不是很多，我们必须节约用水。下面是yuwenmi小编为大家整理的英语作文，欢迎阅读与借鉴，谢谢!

Water is very important for us. We must drink water everyday. We cant live withoutwater.

水对我们很重要。我们必须每天喝水。没有水我们就不能生存。

Water is everywhere around us. At home, we use water to wash clothes, wash dishes, cook rice, clean the flat, have showers, clean our teeth and so on. At work, people use water to put out fires, grow vegetables, make things in factories and so on. Water is important for us, isnt it?

我们周围到处都有水。在家里，我们用水来洗衣服，刷盘子，煮米饭，擦地板，冲凉，刷牙等等。工作的时候，人们用水来灭火，种菜，在工厂里制造东西等等。水对我们很重要，不是吗?

There isnt much water on the earth. It is not inexhaustible. It is very valuable. We must to save it.

地球上的水并不是很多。塔并不是用之不竭的。它很宝贵。我们必须节约用水。

There is no doubting the great benefits which scientific advances have brought us 。 Yet we have become increasingly aware that some technologies’ developing brings unexpected and harmful side effects 。

A number of factories spring up like mushrooms ，exhausting much waste gas ， which leads to the greenhouse effect and air pollutions 。 Plentiful trees are cut down that causes the lands to change into the deserts 。 At the same time ， varieties of species are gradually extincting 。 These phenomenons give us clear warnings of the dangers of failing to live harmony with nature 。

We ought to set up a profound mind to protect our environment 。 For the governments ，they should make detail laws and policies to observe the behaviors of destroying the environment 。 Factories should exhaust polluted water or gas after dealing with rather than merely pursue the economic interests 。 Planting as more as possible trees ， in case of the water and soil erosion 。 For farmers ， they must reduce spraying the insecticides 。 We also must make less use of plastic materials and one—off products 。 In addition ， we wouldn’t throw the rubbish anywhere 。 Thus ， we at least can maintain our environment in a good state 。 However ， that’s not enough 。 We are supposed to work harder to protect our environment 。

[英语作文怎样做到保护环境

最近我听说中国的北方又发生了旱情。据农业部发布的消息说：全国作物受旱面积达1.46亿亩。全国43%左右的冬小麦遭受旱灾。有398万人、195万头大牲畜因干旱而发生饮水困难。从网上我们也看到了那些干枯的河流，原本绿油油的冬小麦很多已成了干草，平整的麦田也变成了一张久经风霜的老人脸，田里布满了纵横交错的皱纹，看到这些画面确实使人感到十分震惊!

那么是什么原因造成了北方干旱呢?直接原因是因为有些地方有100多天没下雨、雪了，是天气造成的干旱缺水。由此可见，出国留学网水与人们的关系是多么重要啊!我们知道：水是人类赖以生存和发展的重要资源之一，是不可缺少、不可替代的特殊资源，没有水就没有生命，也就没有文明的进步。

然而我国是一个水资源奇缺的国家，人均拥有水量是世界的第109位。如果我们再不合理的利用水资源，我们就将会面临淡水资源危机，使人们得不到清洁的饮用水。所以，节约用水，保护水资源，是我们每个人共同的事业和责任!

节约用水，人人有责。所以，只有大家都注意节水了，水荒才能远离我们而去，生活才会安定和谐，环境才会优美舒适。在明白这些道理后，我们就要从自身做起，动员全家开展一水多用，采用节水型家用设备，以实际行动响应节水号召。同时，我们还要做好节水的宣传工作，告诉大家，让大家都来节水。聚砂成塔，节水成河，这也是我们为社会做贡献!

水是一切生命之源，人体重量的60%是水，血液中的90%是水，我们每人每天需要两公斤的水才能维持生命。水又是生产中的首要资源：生产一吨稻谷需要水1400立方米，炼一吨钢需要水200立方米，造一吨纸需要水500立方米。可以说，如果没有水，人类将无法生存

同学们，烈日炎炎的夏天，当你拧开水龙头，舒舒服服地冲着凉水澡时，你们知道吗你洗澡所用的水是缺水地区几十人的日用水量;当你冲洗马桶时，你一次用水量当于发展中国家人均日用水量;当粗心的你没有拧紧水龙头，它一个晚上流失的水，相当于非洲或亚洲缺水地区一个村庄的居民日饮用水量……这些事例决不是耸人听闻，而是联合国有关机构多年调查得来的结论。

大家都知道，我国是一个贫水国家，人均淡水只有2240立方米，不到世界人均水平的四分之一，居世界第109位，被列为世界13个严重缺水的国家之一。由于缺水，我国农村粮食产量减少，西北沙漠化严重，沙尘暴频繁发生。节约用水对于我们每一个中国人来说，已是当务之急。

但是，环顾四周，破坏水资源，污染水资源的现象屡见不鲜。

同学们，"黄金有价水无价"。为了我们自身的健康，为了人类今后的生存和发展，让我们积极行动起来，从身边的小事做起，从一点一滴做起，节约用水，保护我们赖以生存的水资源，做一个惜水如金的"环保小公民"吧!让/"地球上最后一滴清水/将是人类的眼泪"/这样的广告/永远只成为广告吧!

There are still many problems of environmental protection in recent years。 One of the most serious problems is the serious pollution of air， water and soil。 the polluted air does great harm to people’s health。 The polluted water causes diseases and death。 What is more， vegetation had been greatly reduced with the rapid growth of modern cities。

To protect the environment， governments of many countries have done a lot。 Legislative steps have been introduced to control air pollution， to protect the forest and sea resources and to stop any environmental pollution。 Therefore， governments are playing the most important role in the environmental protection today。

In my opinion， to protect environment， the government must take even more concrete measures。 First， it should let people fully realize the importance of environmental protection through education。 Second， much more efforts should be made to put the population planning policy into practice， because more people means more people means more pollution。 Finally， those who destroy the environment intentionally should be severely punished。 We should let them know that destroying environment means destroying mankind themselves。

目前环保还存在着许多问题。最严重的问题就是空气、水和土壤的严重污染。污染的空气对人类的健康十分有害。污染的水引起疼病，造成死亡。更有甚者，随着现代社会的迅速扩建，植被大大的减少。

为了保护环境，各国政府做了超多的工作。采用了立法措施控制大气污染，保护森林资源和海洋资源，制止任何环境污染。因此，在当今的环保中政府起着最重要的作用。

我的看法是，为了保护环境，政府应当采取更具体的措施。首先，应当透过教育的方法使人们充分謒到环境保护的重要性。第二，应更加努力把计划生育政策付诸实施，因为人口多就意味着污染严重。最后，要严惩那些故意破坏环境者。使他们破坏环境就是毁灭人类自我。

[英语作文保护环境的

Today, we read a lot about the passage to protect the environment. I recall ever happened in my side.

Remember last years summer vacation, my father and I went for a walk EHu edge, a way, Im kind of shouted thirsty, so my father on the side of the road store bought me a Popsicle. I ate and go, soon finished eating, carelessly threw the ice sticks into EHu. Dad saw, reminded me immediately; "Coco, cant litter oh! If everyone like you to throw garbage in the lake, the beautiful EHu lake becomes waste." Im ashamed of say: "know, next time I must not litter." Dad smiled and stroked my head and said: "the earth is our home, we should protect it, cherish it, let the sky bluer, the water cleaner, the grass is greener." I naughty to say: "oh, that is, everybody has said, the city is my home, clean environment depends on everybody. I understand." From then on, I no longer throw garbage.

I want to take care of the environment is closely related to everyone, so lets start from everyone!

今天，我们读了很多关于保护环境的小短文。我想起曾经在我身边发生的事情。

记得是去年的暑假，我和爸爸一起去鹅湖边散步，走了一段路，我就一个劲的喊口渴，于是，爸爸就在路边的小店给我买了根冰棍。我边吃边走，一会儿就吃完了，随手把冰棍棒往鹅湖里一扔。爸爸看见了，马上提醒我说;“可可，不能乱扔垃圾噢!如果每个人都像你一样往湖里扔垃圾，这美丽的鹅湖不就变成了垃圾湖了。”我羞愧的说：“知道了，我下次一定不乱扔垃圾。”爸爸微笑着抚摸我的头说：“地球也是我们的家，我们应该保护它，爱护它，让天更蓝，水更清，草更绿。”我调皮的说：“噢，那就是大家一直说的，城市是我家，环境清洁靠大家。我明白了。”让从那以后，我再也不乱扔垃圾了。

我想爱护环境与每个人息息相关，所以要从每个人做起!

Now, some animals have disappeared, and then take crocodile is close to extinction, though very fierce, but humans are more fierce. Because of some organs from animals has the prominent economic value, thus become a subject of human plunder use, become the main factor of extinct animals. Crocodile with sharp teeth, and huge appetite for food, we all said the crocodile, but more afraid of human, the crocodile in the eyes of human, the crocodile can be made into the luggage, handbags, wallets, shoes and other goods, so the crocodile, has now become almost extinct animals.

Animal friends, a lot of destruction of human will have serious adverse consequences, ecological environment caused by serious imbalance, so that the human living environment is destroyed. Eliminate animal, is to eliminate human oneself, if one day the animals in the world are gone, that human can survive? To protect animals, cherish this nature of every creature! Let us start from now, starts from me, to protect the animals, make the world a better place! To protect animals, is to protect human oneself.

现在，有些动物已经灭绝了，就拿快要灭绝的鳄鱼来说，虽然很凶猛，但人类更凶猛。就是因为有些动物身上的器官具有突出的经济价值，由此成为被人类掠夺利用的对象，成为动物灭绝的主要因素。鳄鱼长着锐利的牙齿，和硕大的食物胃口，我们都说鳄鱼可怕，但鳄鱼更怕人类，在人类的眼中，鳄鱼皮可以制成行李箱，手提包，钱包，鞋等物品，所以鳄鱼，现在已经成为快要灭绝的动物了。

朋友们，动物的大量毁灭对人类将产生严重的不良后果，造成生态环境严重不平衡，从而使人类的生存环境遭到破坏。消灭动物，就是在消灭人类自己，如果有一天世界上的动物全都消失了，那人类还能生存吗?要保护动物，珍惜这自然界里的每一个生灵吧!让我们从现在做起，从我做起，保护动物，使世界变得更美好吧!保护动物，就是保护人类自己。

man and environment （人类和环境）

(1)the world we live in is becoming more and more intolerable because of environmental destruction.

(2)a lot of measures have been taken …

(3)however, the problem of environmental protection remains far from being solved.

the world we live in is becoming more and more intolerable because of environmental destruction. for example , forest destruction results in decrease of planting land and unpleasant weather. in addition, man is faced with problems of water pollution and air pollution.

a lot of measures have been taken. planting trees helps improve and beautify the environment. besides, laws concerning environmental protection have been put into effect and achieved good results.

however, the problem of environmental protection remains far from being solved. on the one hand, the environment pollution and destruction are getting worse and worse in the modern world. on the other hand, the lack of knowledge about the importance of protecting environment hinders the solving of the problem. in a word, there is a long way to go before we enjoy a clean and comfortable world.

[关于环境保护的优秀英语作文

With the rapid development of science and technology, human demand for resources is increasing, causing the Antarctic arctic ice melting speed, rising sea levels, the Antarctic ozone hole, increasing dust storms in Beijing, haze weather, the Japanese earthquake nuclear pollution...

When we enjoy the good life at the same time, the thought of the importance of protecting the environment?

So, please keep an eye on our campus, look! The playground, school gate, stair aisle flying confetti, food bag, bottles; Look, those teeth bared on the white wall graffiti... These are not harmonious scene and our campus civilization!

The classmates, if we all take action, to be the master of environmental protection, do not throw confetti, peel, graffito of the scribble not, casually picked up confetti trash on the ground, take good care of the environment, our campus is dressed up beautifully and. When we walk on the tree-lined campus path, will feel relaxed and happy; When we study in bright classroom, will concentrate; When we study in the clean and elegant environment, will feel better.

Beautiful environment, let us know how to cherish, learn to cherish; Beautiful environment, let us knowledgeable and more civilized; Beautiful environment, let us learn to obey, learn to be a person; Beautiful environment, let our moral, make our learning more progress!

随着科技的高速发展，人类对资源的需求越来越多，致使南极北极冰雪融化的速度加快、海平面日渐上升、南极出现臭氧空洞、北京的沙尘暴、雾霾天气不断增加、日本大地震后造成的核泄漏污染……

当我们在享受美好生活的同时，是否想到保护环境的重要性呢?

那么，请同学们关注一下我们的校园，看!操场上、校门口、楼梯过道上漫天飞舞的纸屑、食品袋、饮料瓶;瞧，雪白的墙壁上那些张牙舞爪的涂鸦……这些都是和我们校园文明不和谐的一幕啊!

同学们，如果我们大家都行动起来，争当环保的主人翁，不乱扔纸屑、果皮，不乱涂乱画，随手捡起地上的纸屑垃圾，爱护环境，把我们的校园装扮的漂漂亮亮。当我们在绿树成荫的校园小道上漫步时，一定会感到心旷神怡;当我们在窗明几净的教室里读书时，一定会全神贯注;当我们在整洁优雅的环境中学习时，一定会心情舒畅。

优美的环境，让我们懂得珍惜，学会爱护;优美的环境，让我们知书达理，更加文明;优美的环境，让我们学会谦让，学会做人;优美的环境，让我们道德高尚，使我们的学习更加进步!

Although our country resources, abundant natural resources. But, you know? All these are not enough, more important is to pay attention to environmental protection!

I think the government should advocate environmental protection, more involved in environmental protection, contribute to environmental protection, organize environmental protection is the most critical. You said, is it?

First of all, should tell the public, to pay attention to every green thing, actively do environmental protection work, dont throw rubbish, see garbage to pick up in time. Second, want to throw the waste battery is the problem to solve, I should take this matter to do better, in some places put some recycle used batteries, for people to take every day. As a result, whether living in remote areas, or live in the bustling place, can easily dispose of used batteries, never going to happen that people dont know how to deal with waste battery threw the waste batteries into the dustbin. Finally, the government should increase the position of a environmental protection worker, let more people involved in the environmental protection work.

In order to environmental protection, take action!

我们的祖国虽然资源、物产比较丰富。可是，你知道吗?光光这些都还不够，更重要的是要注重环保!

我觉得，政府应该多多提倡环保，多多参与环保工作，为环保做贡献，组织好环保是最关键的。你们说，是吗?

首先，应该告诉市民，要关注每一件环保的事，积极做环保工作，不要随手扔垃圾、看到垃圾要及时捡起。其次，要把废旧电池该扔哪的问题解决好，应该把这件事给做得更完善：在一些地方分放一些回收废旧电池的筒，每天都有专门负责的人去取。这样一来，不管是住在偏远地区，还是住在热闹的地方，都可以很方便的把废旧电池处理了，再也不会发生人们不知道废旧电池怎么处理，就把废旧电池扔进垃圾箱里的事了。最后，政府应该增加一个环保工作者的职务，让更多的人投身于环保工作当中!

为了环保，行动起来吧!

Our environment is getting worse and worse now.People throw their garbage here and there.Factories make more and more dirty water that has polluted the rivers and lakes.What should we do?We must find ways to stop pollution.Waste water must be cleaned before it is poured into the river.People shouldn‘t throw away rubbish here and there.We should pick up the garbage around us.We‘d better plant more trees.I‘m sure if we take care of our environment,our world will be more beautiful!

Now, "environmental protection" has become a global focus. But to truly protect the environment, we must start from ourselves and start with the small things around us.

One day, I went to play in the small river in the park. A little boy wanted to throw a fresh bottle into the river. I looked at it and said, "no matter what, Im going to play. If I take care of him, I wont be able to play." But at this time, one is old man on a fishing trip saw the little boys behavior quickly held out his hand to stop a small boy, and said to the boy: "child, dont throw rubbish into the river." The little boy listened and put down the bottle and said to the old man, "whats the big deal? Besides, this is a bottle, not a garbage." The old man listened and was not angry. Smiled and said to the boy, "son, you dont understand. You dont see it as a bottle, but it will also be like other garbage pollution water. We cant drink clean water. Moreover, the trash can is over there, a few steps away." The little boy was speechless to the old man. He said "thank you" to the old man and ran to the trash can.

I listened to that thought, "thats right. When we want to throw fruit peel, tend to throw the rubbish casually into the trash can outside, and ignored. In fact, as long as you stretch out his hand, will be thrown into the trash can. Sometimes, you can throw some wrapping paper with a, then a walk it. Later, you said cant find the trash can. In fact, trash can in a few steps away." These little things can reflect a persons moral character and whether he loves the environment around him.

Protect the environment. Its all about us. Everyone has to do their part. This will make our home more colorful!

【作文题目】保护濒危动物

要求：1.以约30个词概括短文的内容要点;

2.然后，以约120个词就“endangered animals”的主题发表看法，内容包括：

(1)濒危动物的现状;

(2)就如何改变这个现状，谈谈你的看法;

(3)假如你是濒危动物的一员，你如何呼吁人们关注濒危动物。

范文

There are more and more endangered animals at present,so how to protect them has been our task of top priority . Its wrong for people to hunt animals for their meat and feather,for they are our good friends.We should protect them instead of killing them.Giant pandas,which are one of the endangered animals,live in the forests and live on bamboo lealves.They can just live safely in the natural protection zones.We should stop killing animal and protect them.

目前，濒危的动物正在日益剧增。如何保护濒危动物成了我们的当务之急。人们疯狂的捕杀动物，为了它们的肉、皮毛。我们这样做是不对的，因为动物是我们的朋友，我们应该保护它们，而不是将它们赶尽杀绝。大熊猫就是濒危动物的代表，它生活在森林里，以竹子为食，它们仅仅依靠着自然保护区生存。我们应该停止对动物们的捕杀，更好地保护它们

Protection of the Environment Once man did not have to think about the protection of his environment. There were few people on the earth, and natural resources seemed to be unlimited. Today things are different. The world has become too crowded. We are using up our natural resources,and polluting our environment with dangerous chemicals. If we continue to do this, human life on earth will not survive. We realize that if too many fish are taken from the sea, there will soon be none left. Yet,with modern fishing methods, more and more fish are caught.We know that if too many trees are cut down, forests will disappear. Yet, we continue to use powerful machines to cut down more and more trees. We see that if rivers are polluted with waste products, we will die. Yet, waste products arestill put into rivers. We know that if the population continues to rise at the present rate, in a few years, there wont be enough food.What can we do to solve these problems? If we eat more vegetables and less meat, there will be more food available. Land for crops feeds five times more people than land where animals are kept. Our natural resources will last longer if we learn to recycie them. The world population will not rise so quickly if people use modern methods of birth control. Finally, if we educate people to think about the problems we shall have a better and cleaner planet in the future.

There is only one earth. He is the cradle of life, is the homeland of all mankind. However, environmental pollution and ecological destruction of normal life has been on the social and economic development and peoples constitute a real threat. Care for the environment, advocate of civilization, is the humans moral responsibility.

我们渴望干净的地球，渴望健康的地球，渴望环保的家园，渴望绿色，健康，卫生的社区……让我们用爱心去关注环境的变化，用热情去传播环保的观念，用行动肩负起环保的重任。从我做起，从现在做起，从身边的点滴小事做起，把环保承诺变为实际行动。

We desire to clean the earth, to earth for environmental health, home, eager to green, health, the health of the community...... Let us love to pay close attention to changes in the environment, with enthusiasm to spread the idea of environmental protection, with action to shoulder the responsibility of environmental protection. Begin from me, start from now, start from the side of the little things, the environmental commitments into actions.

记住，保护地球，就是保护我们自己。

Remember, the protection of the earth, is to protect ourselves.

Today there is more and more pollution and the environment is becoming worse and worse. So we have to know how to protect the environment. Here are some ways.

今天有更多的污染和环境变得越来越糟.所以我们必须知道如何保护环境.这里有一些方法.

First, we can stop driving our personal cars. We can go to school or work on foot or by bus. Not only can it protect environment, but also it is good for our health.

首先,我们可以停止驾驶私家车.我们可以去上学或上班步行或乘巴士.不仅可以保护环境,而且它对我们的健康有好处.

Second, we are not supposed to drop litter anywhere, we should put them into the trash bin. And it’s best to pick up the litter on the ground when we see them.

第二,我们不应该乱扔垃圾的地方,我们应该把它们扔到垃圾桶里.最好在当我们看到他们地捡起垃圾.

Third, we should save the paper, the water, the food and so on.

第三,我们应该节约纸张,水,食物等.

Fourth, we should protect the trees and we should plant more trees.

第四,我们应保护树木,我们应该种更多的树.

I think if everyone does something to protect the environment, our world will be much better.

我想,如果每个人都做些什么来保护环境,我们的世界会更好.

1. To cherish the enviroment is to love ourselves.

爱护环境就是爱护我们自己。

2.Water is the source of ourlives

水是生命之源。

3.I make an urgent appeal that measures should be taken to cope with the situation

我急切呼吁应该采取措施改变现状。

4.Our government is doing its best to take measures to fight against pollution.

我们政府正努力制定措施与污染作斗争。

5.We are sure that well win the battle.

我们坚信我们能赢得战斗。

6.Its high time that we should protect our enviroment from being polluted.

是时候我们应该防止环境污染了。

7. Keep our mountains green，the wate clean，and the sky blue.

使我们山更绿，水更清，天更蓝。

8.However，natural resources are not inexhaustible.some reserves are already on the brink of exhaustion.

然而自然资源并不是无穷无尽的，一些储量已经到了穷尽的边缘。

9.If we do something with no thought for the furture . The later generation would be in danger.

如果我们不为将来考虑，后代就会受到威胁。

10.Our earths days are numbered without urgent help.

没有及时的帮助我们的地球就屈指可数了。

11(Sth.)are bound to generate severe consequences if we keep turning a blink eye to them.

如果我们继续睁一只眼闭一只眼的话，……一定会有恶劣的后果。

海水盐度如果我们分析海水的盐度，会发现地区间只有轻微的变化，然而有些小的变化是重要的。

导致海洋的盐度变化的基本过程有三个，其中之一是通过蒸发的方式即把液态水转化为水蒸气来减少海洋中的水分。

这样由于盐留了下来，所以盐度增大。

当然，如果这种方式走向极端，将会余下白色的盐晶体。与蒸发相反的是降水，如降雨，由此水被加入海中，海水被稀释，从而盐度降低。

这种情形会发生在大量降雨的地区，或江河入海岸处。因此，盐度通过蒸发减少水分而上升或通过降水或径流增加淡水成分而下降。一般来说，在阳光很

强烈的热带地区，海水的盐度略高于世界上其它没有热带那样多的蒸发的地区。同理，在江河稀释海水的海岸地带，海水盐度略低于其它海区。

第三个可以变更盐度的过程与海洋中冰的形成和融化有关。海水冻结时，溶于其中的物质被留了下来。这样，在新形成的海

水冰面的正下方的海水比在冰形成之前有更高的盐度。

当然，当冰融化的时候，会降低周围水中的盐度。

在南极洲边缘的威德尔海中，结冰过程增加低温海水的盐度，从而形成了浓度最大的海水。这些大密度的海水下沉，可以在世界海洋的深水域发现。

if the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. nevertheless, some of these small changes are important. there are three basic processes that cause a change in oceanic salinity. one of these is the subtraction of water from the ocean by means of evaporation--- conversion of liquid water to water vapor. in this manner the salinity is increased, since the salts stay behind. if this is carried to the etreme, of course, white crystals of salt would be left behind.

the opposite of evaporation is precipitation, such as rain, by which water is added to the ocean. here the ocean is being diluted so that the salinity is decreased. this may occur in areas of high rainfall or in coastal regions where rivers flow into the ocean. thus salinity may be increased by the subtraction of water by evaporation, or decreased by the addition of fresh water by precipitation or runoff.normally, in tropical regions where the sun is very strong, the ocean salinity is somewhat higher than it is in other parts of the world where there is not as much evaporation. similarly, in coastal regions where rivers dilute the sea, salinity is somewhat lower than in other oceanic areas.a third process by which salinity may be altered is associated with the formation and melting of sea ice. when sea water is frozen, the dissolved materials are left behind. in this manner, sea water directly materials are left behind.

in this manner, sea water directly beneath freshly formed sea ice has a higher salinity than it did before the ice appeared. of course, when this ice melts, it will tend to decrease the salinity of the surrounding water.in the weddell sea antarctica, the densest water in the oceans is formed as a result of this freezing process, which increases the salinity of cold water. this heavy water sinks and is found in the deeper portions of the oceans of the world.

这句话说得没错，如果没有了水，地球就会干裂;如果没有了水，我们人类就可能渴死;如果没有了水，就没有了我们这个美丽的世界。我们要爱惜每一滴水，爱惜地球母亲每一滴眼泪。

我校有好多同学，一下课，就跑到水龙头跟前，把水龙头打开，然后就拿水泼别人。走的时候也不把水龙头关上，就飞快地跑。

我曾经也干过这样一件“傻”事。

每个礼拜，我和姐姐都要玩水，我们把水龙头打开，水表里的红色三角就转起来了。水龙头开得越大，红三角转的速度越快，付的水费也就越多。

一天，我和姐姐又要玩水了，姐姐一打开水龙头，水表里的红三角又转起来了。姐姐看了，自言自语道：“要是水流出来，水表不走那该有多好啊!”这句话正巧被在旁的我听见了，我想了想，就说：“姐姐，我们只要把水龙头开得小一点，水表就不会走了。”“真的吗?”姐姐惊讶的问。“不信你自己试试看。”姐姐试了试，果然，和我说的一样。姐姐又高兴又惊奇地问：“谁告诉你的?”“谁也没有告诉我。”“昨天，我洗完脸，没有把水龙头关紧。水一滴一滴地流出来，可水表一点也没走。”我神秘地对她说。“好，好，好!那我们快积水。”可是她一想，便皱起眉头，姐姐说：“这样太慢了!”“不要紧，我们只要从早上开始一直积到中午，不是就有许多水了?”她立刻迎上去说：“这叫积少成多。”说完，我俩发出低微的会心的笑声。

这个“秘密”终于被爸爸发现了。

我们争先恐后的把这个“秘密”告诉爸爸，以为爸爸会表扬我们。谁知道，爸爸语重心长地对我们说：“你们知道你们在干什么吗?这是偷水!”“啊?我和姐姐呆住了。我们都成了小偷了，这么严重呀!爸爸又说：“如果人人都像你们一样，谁给国家交水费呀!你们不是偷了国家的水吗?在说，浪费水也是不应该的!”听了爸爸这番发人深思的话，我和姐姐的脸“唰”地一下子红了。过了一会儿，我忽然昂起头，指着那盆水说：“爸爸，我们把这盆水交工吧!”“这倒不必了，以后可不能再这样做了。”爸爸严肃地对我们说。我们响亮的回答：“是!”

同学们，如果你们也是这样的话，就请赶快改正吧!

水是生命之源，我们要节约每一滴水……