你们永远不能以貌取人。

You can't judge a book by its cover, ever.

youdao

往后的日子就是埋怨和懊悔，相信这句话吧，对您和别人都一样，你们两个人就套上了一条你们永远不能砸碎的锁链。

Then the day of reproaches and regrets would dawn, you can be sure of it, for you both just as it would for them, and the pair of you would have a chain around your necks which you could never break.

youdao

当它断裂的时候，压力事实上，比这个小，这个我永远不能，在课上给你们看，但我能解释原因。

Then when it breaks, the stress here is actually lower than there, and this is something I can never show you in class, but I can explain to you why that happens.

youdao