為甚麼腳踏車輪越細就騎的越快? - 自行車
By Emma
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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自行車
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By Jacob
at 2009-03-21T20:44
at 2009-03-21T20:44
By Candice
at 2009-03-20T05:08
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at 2009-03-19T23:37
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By Skylar Davis
at 2009-03-19T14:29
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