写一篇关于自行车的发明，要求写出是被谁发明的，被用来做什么，什么时候被发明的。英语作文，记住要用被
写一篇关于自行车的发明，要求写出是被谁发明的，被用来做什么，什么时候被发明的。英语作文，记住要用被动语态...
写一篇关于自行车的发明，要求写出是被谁发明的，被用来做什么，什么时候被发明的。英语作文，记住要用被动语态
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The bicycle is the most successful human inventions of a human machine, is composed of many simple machines.
bicycles is invented in 1790 by Schiff .Bicycle can be used as environmental protection of transport ,and can be used to instead of walking, travel; It can be used to ride bikes to exercise by people.
bicycles is invented in 1790 by Schiff .Bicycle can be used as environmental protection of transport ,and can be used to instead of walking, travel; It can be used to ride bikes to exercise by people.
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