Davyn felt his feet leave the wood of the chair and wrapped his hands around the wool rope.
达文感到他的脚正慢慢远离椅子,他的手死死攥住绳圈。
Each time the swimmer's feet leave and enter the water, air comes along, increasing drag and reducing thrust.
无论什么时候,只要游泳者的脚从水面之上打入水中,空气就会随着脚进入水中,这些空气泡会产生阻力,而且还会减少推动力。
That's what I have been saying. A 33 years old Yao might not be able to jump anymore. But when was the last time you saw both of Yao's feet leave the floor at the same time anyway?
我早就说过了。姚33岁的时候肯定跳不起来了。但是你最后一次看见姚双脚离地是什么时候?。
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