Global Shortage of Fresh Water 全球淡水资源短缺


Many people believe that the world’s supply of fresh water will never be used up. They think that fresh water comes from such a variety of sources that it is always sufficient for use. Such an opinion leads to a shocking waste of water.

As a matter of fact, the earth is short of fresh water. Furthermore, with the rapid growth of the world population, the rising demand for water by industry, and the serious pollution of our surroundings, the world is facing the ganger of running out of fresh water. Actually, in some big cities, fresh water can not meet the daily needs.

Therefore, to find new ways to save water is an urgent task. First, we should pass strict laws to control any waste of water. Second, scientists must work even harder to purify sea water, and try to find substitute to reduce the use of fresh water.
 

许多人认为,世界上的淡水供应的永远不会用完。他们认为淡水来自各种来源,它总是足够使用了。这种观点导致了一个令人震惊的浪费水。

事实上,地球上淡水短缺。此外,世界人口的快速增长,对水的需求不断增加,工业和环境的严重污染,世界正面临耗尽淡水的工头。实际上,在一些大城市,淡水不能满足日常需求。

因此,寻找新的方法来节约用水是一个紧迫的任务。首先,我们应该通过严格的法律来控制任何浪费水。第二,科学家必须加倍努力净化海水,并试图找到替代品减少淡水的使用。

水资源 Water resources


人们总以为淡水是取之不尽的，实际上淡水资源是很有限的。请谈谈你的看法。

　　It is generally believed that there is a good supply of fresh water. But to our disappointment, the fact is just the opposite.

　　As we can see, the world population is growing rapidly day by day. So enough fresh water is needed to feed such a big population. What's more, with the development of industry, factories and vehicles produce poisonous gases or wastes, which consequently results in the pollution of water. Though fresh, a good amount of it can no longer be used. Only quite limited fresh water resource is available to human beings. So it's high time for us human beings to take quick action to protect water resource. Stop pollution and save water, otherwise, we cannot survive on the earth.

　　With fresh water, the world will be prosperous.

人们普遍认为，有一个很好的食水供应。但令我们失望的是，事实恰恰相反。
我们可以看到，世界人口正在一天天地迅速增长。因此需要足够的淡水养活这么多的人口。更重要的是，随着工业的发展，工厂和车辆产生有毒气体或废物，因而造成了水污染。虽然新鲜，但好大一部分的水不能再使用。只有很有限的新鲜水资源可供人类。所以这是我们人类采取快速行动，保护水资源的时候了。停止污染和保存水，否则，我们不能在地球上生存了。
只有新鲜的水，这个世界才会繁荣。

Water cycle 水的循环


water can change from one form to anotheer. the heat of the sun evaporates water from the oceans, seas, rivers and lakes. the heat also evaporates water from the ground and from plants and animals. water vapour is formed. this forms clouds in the air.

　　when the clouds come near a mountain, they are forced to rise. as the clouds rise, they are cooled. the higher they rise, the more they are cooled. this causes more and more water vapour to condense. in this way, the tiny drops of water in the clouds get bigger and bigger until they are heavy enough to fall to the earth as rain.

　　some rain water which falls on the earth is again evaporated. some of it sinks into the ground. it may be used up by thirsty plants. it may reach a well or a spring. most of the water goes back to the rivers, seas and oceans. this process then starts all over again. this process is called the water cycle.

水的形态可以变化。太阳的热使水蒸发从海洋，海洋，河流和湖泊。的热量也从地面和植物和动物。这样就形成了水蒸气。这种形式的云在空中。

当乌云靠近一座山，他们被迫上升。随着云的兴起，他们被冷却。他们越涨，他们越是冷。这就使越来越多的水蒸气凝结。这样，在云层中的小水滴越来越大直到重落到地面的雨。

一些雨水落在地球再次蒸发。一些雨水渗入地下。它可能被干渴的植物吸收。它可能达到良好或弹簧。大部分的水回到河流，海洋。这一过程又重新开始。这个过程称为水的循环。