This all came hard and at the cost, I'm sure, of a lot of human life and a lot of misery.

一切都变得艰难了,我确定,这夺走了很多人的生命,造成了很多痛苦

耶鲁公开课 - 古希腊历史简介课程节选

So this becomes where defining the system and the boundaries and everything becomes important.

因此问题就变成了,如何定义系统和边界,那么一切都变得重要了。

麻省理工公开课 - 热力学与动力学课程节选

So, hunger sets in and it becomes extremely sad and tragic, and attempts to break out simply don't work; but, it had its light moments, and I can never resist those.

饥饿来临,一切都变得如此悲惨,而尝试逃跑只是徒劳,但这其中也有些趣事发生,我对这些逸事总是没抵抗力

耶鲁公开课 - 1871年后的法国课程节选

I've the--Everything's growing greyer and dimmer.

一切都变得混沌暗淡。

耶鲁公开课 - 死亡课程节选