这些想法的自行车来自不同的来源，包括商业自行车，历史的和发明人自己的冲动。
The ideas for the bicycles come from a variety of sources, including commercial bikes, historical ones and the inventor's own whims.
这些想法的自行车来自不同的来源，包括商业自行车，历史的和发明人自己的冲动。
Thee ideas for the bicycles come from a variety of sources, including commercial bikes, historical ones and the inventor's own whims.
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