那么问题来了：谁会把自行车脚蹬改的那么高啊？
自行车脚蹬曲柄在自由状态时，曲柄处于随遇平衡，产生人机干扰。
The bicycles pedal cranks keep indifferent equilibrium state when they stay in the free state, so that they can bring about disturbance between people and machines.
充分的信息寻找什么，在您的自行车脚蹬踏板，可以让你的选择过程容易。
Adequate information on what to look for in your bike pedals can make your pedals selection process easy.
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