It's very convenient for us to use . the greatest advantage of bike-sharing is that it can relieves the traffic pressure and reduce pullution to the environment .but there is a proplem about it,some bike-sharings are thrown away and broken.in my opinion,I think they are very useful and believe they will make our society more beautiful. sharing the bike is so interesting. We can take exercise with it. Meanwhile, Our environment get protected. Let's go into action!
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