奥运英语演讲稿:人类奥运，绿色庆典

　　olympics of mankind,
　　celebration of green nature
　　good morning, everybody!
　　let's start with the very simple question: do you know the tree coverage rate of beijing? well, the recent numerical value is 49.9%. it sounds much, but is there simply one tree that was planted by you? if there is, let's say you're really great. but if not believe me you are not alone cuz it's rather difficult for us students to get i
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