Trees
When spring comes,many trees turn green.They grow leaves again.In summer,trees grow best.Each tree is like a green umbrella.The thick leaves make the tree beautiful and lively.And many people enjoy the cool air under the trees.Trees are good for people's health.Trees take in carbon dioxide(二氧化碳)from the air and make oxygen(氧气).But in autumn,the leaves of most trees turn yellow and fall.Some trees are still green,like conifers(秘柏).Trees are the protectors of nature.We need to protect them.We can't cut too much.
译文：
树
当春天来临的时候，许多树会转绿。它们又长出了叶子。在夏天，树木长得最好 。每一棵树都像一把绿色的大伞。茂密的树叶使得大树又漂亮又有生机。 许多人喜欢在树下乘凉。 树木有益于人们的健康。树木吸收空气中的二氧化碳，放出氧气。但是在秋天，大部分树的叶子就变黄并掉落。也有一些树还是绿色，比如松柏。树是大自然的保护者。我们要保护好它们。我们不能过度砍伐。