"You can't ] because you don't know how to speak.

你不能说,因为你不知道该怎么说，她说道。

耶鲁公开课 - 现代诗歌课程节选

And once you know how it sounds, making those sounds for yourself would be a lot easier to do.

一旦你知道该怎么发音，你就能更加容易地把它说出来。

想征服英语的话 - SpeakingMax英语口语达人

And what the physicalist would need to do for each one of those-- For each one of those you can imagine a dualist who says, "We need to believe in a soul so as to explain seances.

对于这些东西,物理主义者该怎么做,对于这些,你可以想到二元论者会说,我们需要相信有灵魂才能解释通灵

耶鲁公开课 - 死亡课程节选

and your hairstylist says, "Oh, I know exactly what to do. We should make your hair blonde."

你的发型师说，“哦，我知道该怎么做。我们要把你染成一头金发。”

I'm afraid of 课堂 - SpeakingMax英语口语达人

But notice what this does. The first thing it does is, it says, let's check and make sure x is greater than or equal to 0. If it isn't, notice what's going to happen. None of that block is going to get executed, and it's going to come down here and print out a useful piece of information, which says, hey, you gave me a negative number. I don't know how to do this.

做的是和以前一样的事情,但是注释它做了什么，第一件做的事情就是,程序说，要去检查并且确信x是大于等于0的，如果不是的话，请注意会发生什么,下面的代码都不会被执行,程序会到这里来然后显示一些有用的信息,信息会说，嘿，你给了我一个负数,我不知道该怎么弄这个了。

麻省理工公开课 - 计算机科学及编程导论课程节选