不要去假装别人，你想要的对象很快你会察觉到这些谎言和假动作。

Try not pretending someone who you are not. The object of your desire soon will feel the lies and feints.

youdao

当你没有自信时，要假装你很自信(也许通过一些好象你已经很有自信的动作).一直这样做下去，你会发现你的这种假装的自信很快会变成真正的自信。

If you can pretend that you feel confident when you don't (perhaps by acting like you've already got what you want) and keep on doing so, your fake confidence will soon turn into real confidence.

youdao

练习原理：你的身体能很快的适应重复的动作，但却需要一段时间来调节练习动作——这就是为什么你可以保持相同的练习动作。

Why it works: Your body quickly ADAPTS to the number of reps you perform, but it takes a while to adjust to the exercises you do. (That's why you can keep using the same exercises.)

youdao

You're taking the air inside of the pump and you're compressing it. You're doing it so fast that there's not enough time for heat to come out of the gas that's inside the pump towards the walls of the pump.

你把空气吸进气筒里并且压缩它,你的动作很快以至于,没有足够的时间让热量,从气筒里面跑出来,传递到气筒壁上。

麻省理工公开课 - 热力学与动力学课程节选