As it goes up, gravity affects it and slows down (Ease In), then it starts its downward motion more and more rapidly (Ease Out), until it hits the ground.

当他上升时，重力影响它使它变慢(缓入)，然后开始下降时动作就越来越快速(缓出)直到它弹跳到地面。

youdao

Humans are used to thinking of slow moving rivers and tides that ease in and ease out.

人类习惯了认为河流和海潮是缓慢运动的，悠闲地来来去去。

youdao

For snappy cartoon motion, you may have ease in and out over only a couple of frames. But even 3 frames of ease in and out may help a limb from looking too stiff or mechanical.

卡通类型的动作里你只要2帧来做这个渐变过程就可以，但如果是用3帧来做，看上去就会比机械的僵硬的动作好很多。

youdao

The home side were happy to play possession football after that and closed out the game with ease - keeping plenty in reserve while sending out a clear signal of their intent to regain their title.

BBC: Manchester United 2-0 Sunderland

And once you're in a plunge, it's important to ease out of the water just as you eased in.

CNN: Are polar bear plunges good for you?

It was Reagan who helped ease out Augusto Pinochet in Chile, and now we have a very successful democratic government in Chile.

NPR: Role of U.S. Changing in New World Order