Trees are our friends!
本文作者： 21ST
March 12 is Tree Planting Day (植树节). 树可是大自然的宝贝！They do us a lot of good. Come with me to learn the life of trees. How does a tree work? Hi, I'm the trunk! I carry water and food up from the roots to the leaves. I also carry food down from the leaves... |  |
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