If you don't know yourself and know your opponent, then this kind of confidence scares me.

如果你不了解你自己和你的对手，那么你的这种信心让我感到害怕。

youdao

"One day my pastor said to me, 'Roza, if you don't know what to do, why don't you do what you like?'" she remembers.

“某天我的牧师对我说，‘罗萨，如果你不知道该做什么，为什么不去做你喜欢做的事情？’”，她回忆说。

youdao

I don't know if you remember me, but we used to be best friends in Jamaica Plain when we were kids.

我不知道你还记得我吗，但我们曾是最好的朋友，在牙买加平原时，当我们都还是孩子时。

youdao

Well if I-- you know, with let me say it differently. I don't need to worry about how checking is done, it's handled inside of that function.

好，如果你们知道，抱歉，让我们换种说法,我不必担心检查工作,是则会么做的，这是在方法体内部进行的。

麻省理工公开课 - 计算机科学及编程导论课程节选

If you don't give me seven hours a week, I don't know what I can do for you.

如果你们一周不学习7个小时，我不知道我能为你们做什么了。

麻省理工公开课 - 固态化学导论课程节选

I don't know if you can see, probably not, what's written on here, so let me point out to you a few things.

我不知道大家是否知道，这很可能不是其中的一种，那么让我来为大家指出一些事实。

麻省理工公开课 - 化学原理课程节选

So if you don't like me, go ahead and just say, you know, you're a bum -- that's okay.

WHITEHOUSE: Town Hall in Los Angeles

'I don't know if you remember me, but I think I gave you something that's very precious to me, ' and he says, 'Was it a ring?

CNN: STORY HIGHLIGHTS

"I don't know if it will make me a millionaire but you never know, " he said.

BBC: Robot speeds up DNA testing