行或者不行，他一定要有个答复。

He must have an answer, yes or no.

youdao

所以，你和他之间一定要有这样一种联系、一种互相理解、一种感觉：他和你目标一致，而不是你在帮助他前往他所想到达的地方。

So you've got to really [have] that bond, that understanding, that feeling that he's in it with you, as opposed to you're helping him get to where he's going.

youdao

Linux和Unix允许用任意的字符序列来作为文件名，所以，如果您正在使用一个来自攻击者的目录或者接受他的一个文件名，一定要有所准备。

Linux and Unix allow just about any series of characters to be a filename, so if you're traversing a directory or accepting a filename from an attacker, be prepared.

youdao

It is a little bit difficult in the sense that to have gotten into Princeton, one almost certainly has had to know something about something. Right?

之所以比较困难是因为,一个人如果想要进入普林斯顿大学，他一定,对某个领域有一定了解？

普林斯顿公开课 - 人性课程节选