当你旋转时，你的上半身必须完全放松。

When you turn, you have to relax the upper body totally.

youdao

当你旋转定时器的转盘时，鸟嘴会降低，而茶叶袋也会浸入杯中。

As you turn the timer dial, the beak lowers the tea into the hot water.

youdao

即使在汽车熄火及锁着的时候，这些冷却风扇也在呼呼旋转着，所以当你回到车内时，你无需开大耗电的空调。

Even when the car is off and locked, these fans whir around, so when you step back into it you don't need to crank up the power-hungry air conditioning.

youdao

When we have just a single bond in them molecule, you have all the free rotation you want, you can just spin it around, there's nothing keeping it in place.

当我们在分子力只有一个单键时，你可以随意旋转，你可以让它转起来，没有什么东西能固定住它。

麻省理工公开课 - 化学原理课程节选