1·Extreme skaters perform jumps, spins, flips, etc.
极限滑板运动员能做跳跃、旋转、空翻等动作。
—— 《牛津词典》
2·Because the earth spins, it is not a perfect sphere.
因为地球旋转，所以它不是个完完全全的球体。
—— 《柯林斯英汉双解大词典》
3·An earthquake can make earth rotate faster by nudging some of its mass closer to the planet's axis, just as ice skaters can speed up their spins by pulling in their arms.
一次地震可以使地球旋转得更快，通过将地球的质量向它的轴线轻推，正如滑冰的人可以通过缩回他们的手臂来使旋转加速。
4·Since that pulls mass closer to the planet's spin axis, it causes the planet to rotate faster - just as an ice skater spins faster when she pulls her arms towards her body.
由于质量朝地球旋转轴靠拢，这就导致地球旋转速度加快- - -就像一个速度滑冰选手，当她把胳膊向身体收拢时就会旋转得更快。
5·The robotic samara spins about 15 times per second and can navigate through small areas and avoid obstacles, giving it advantages over larger vehicles such as helicopters and airplanes.
机器翅果旋转大概每秒15次，并可以导航通过小的地方并且避障，比大的机器如直升机或者飞机更加突出其优点。