Tree’s Function 树函数
时间：2015-11-07 19:25:56 字数：来源：互联网
Trees are very important to US．Do you know why? Let me tell you． Firstly，trees take in CO2 from the air and make oxygen．Thats important．people and animals need oxygen to live．If there were no trees on the earth，there would be no lives，either．And they are also useful for the cycle of air．They can also control the climate，make the weather very calm． Secondly，many small animals live in trees，they are the homes of many live things，and many animals also feed on their fruit and leaves．In other words，trees can provide food and shelters for these animals． Thirdly，the roots of trees can hold the soil，and leaves or the trunks can store plenty water，it can stop water and soil from running away．If we have enough trees，we can stop deserts from moving towards good land．We can also make deserts smaller with the help of trees． Next time，when we enjoy the shade of trees in hot summer，recall what I told you．I think you will know more about trees．
树木对我们很重要，你知道为什么吗？让我告诉你。首先，树木吸收空气中的二氧化碳和氧气。这很重要。人和动物都需要氧气才能生存。如果地球上没有了树，就没有生命，either.and也可用于空气循环。他们还可以调节气候，使天气很平静。其次，许多小动物生活在树上，它们是许多生物的家园，许多动物也吃水果和树叶。换句话说，树木可以为这些动物提供食物和避难所。第三，树根可以保持土壤，和叶子或树干可以储存大量的水，它可以阻止水土流失。如果我们有足够的树木，我们可以阻止沙漠向良田。我们也可以让沙漠与树木的帮助较小的。下一次，当我们享受在炎热的夏季树木的阴影，记得我告诉过你我。想你会知道更多关于树。