為甚麼腳踏車輪越細就騎的越快? - 旅遊

By Bennie
at 2009-03-17T00:00
at 2009-03-17T00:00
Table of Contents
我曾試著跟騎細輪腳踏車的人比賽,不過沒有一次贏過,所以我想問問看為甚麼騎細輪腳踏車較快?
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旅遊
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By Kelly
at 2009-03-20T07:59
at 2009-03-20T07:59

By Candice
at 2009-03-19T11:59
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at 2009-03-17T16:26
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By Thomas
at 2009-03-20T22:40
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