因素

根据观察,影响自行车客骑行劳累程度的因素除了自行车客的体力、自行车客(连同车)的体重、骑行的坡度、沿途所遇交通灯的次数之外,自行车的胎压和心理作用也占据相当比例。
今日清晨,骑在有比昨日鼓了一倍的车胎的自行车上上学,我的双腿仿佛充满了力量,到达目的地时,也似乎没有平时劳累。

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