The scientists say that the back-leg push-off must have evolved first, with the ability to rotate and land softly evolving later.
科学家表示，后腿起跳这个动作必然比四肢交替摆动、轻盈落地的能力进化更早。
The scientists say that the back-leg push-off must have evolved first, with the ability to rotate and land softly evolving later.
科学家表示，后腿起跳这个动作必然比四肢交替摆动、轻盈落地的能力进化更早。
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