Earth's Resources
地球资源
The earth has many natural resources that people need to live.
地球上有许多人类赖以生存的自然资源。
Trees, coal, oil and water are all natural resources.
树木、煤炭、石油和水都是自然资源。
Some resources can be replaced.
一些资源可以更换。
If we plant another tree after we cut a tree down, new trees will grow.
如果我们砍倒一棵树后再种一棵树，新树就会生长。
But some resources cannot be replaced.
但是有些资源是无法替代的。
Resources like oil and coal will not last forever.
像石油和煤炭这样的资源不会永远持续下去。
One day they will run out.
总有一天他们会用完的。
So we must be careful when using these resources.
所以我们在使用这些资源时必须小心。
Using too many natural resources can have a bad effect on the environment.
使用过多的自然资源会对环境产生不良影响。
If that happens, it will make our lives difficult.
如果发生这种情况，它将使我们的生活变得困难。
If we cut down too many trees, the soil will be washed away by rain and wind.
如果我们砍倒太多的树，土壤就会被风雨冲走。
Using too much coal will pollute the air.
用太多的煤会污染空气。
We should have conservation plans to use our resources carefully.
我们应该制定保护计划，谨慎使用我们的资源。
If we do this, we can enjoy our resources longer.
如果我们这样做，我们可以更长时间地享受我们的资源。