That is correct, but you don't want to give it a definite push.

这没错,但你没有给出一个确定的推力

耶鲁公开课 - 基础物理课程节选

And in fact, you can take the wire, the electrode, and hook it up to a lever and teach the rat how to push the lever and give itself a little burst of pleasure.

事实上可以把电线，电极，连接到一个杠杆上，教老鼠,推动杠杆获得快感。

耶鲁公开课 - 死亡课程节选

Somehow, if you could manufacture a really smooth frictionless surface, that if you took a hockey puck or something and an air cushion and you give it a push, in some idealized world, it'll travel forever.

如果你制造一个绝对光滑无摩擦的表面,然后在上面放个冰球或者别的什么,或者气垫,然后推它一下,在理想条件下,它会永远运动下去

耶鲁公开课 - 基础物理课程节选