All land animals with four legs have almost same leg length.
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送交者: AI 于 2006-6-08, 14:07:44:
回答: 那兔子呢?那腿够壮,也不用起飞。为什么也跳着走路? 由 PoohHunny2 于 2006-6-08, 13:57:39:
When two fronts are too short, walking is less efficient than jumping.
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