听到这个回答,鸽子迅速地飞向地面。
然而,如果钻石要存活,它们必须迅速地飞向地球表面。
If diamonds are to survive, though, they must shoot toward Earth's surface quickly.
弯曲你的膝盖以及你的后腿膝盖向地面方向弯曲,保持前脚踝触地,以及膝盖在脚中心的正上方。
Bend your knees and lower your back knee towards the floor, keeping the front heel down and the knee directly over the centre of the foot.
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