By and by you will just naturally know one from the other, but you never will be able to explain why or how you know them apart.

渐渐地你自然会明白怎么区分它们，但是你就是解释不了为什么你知道或你是怎么知道它们之间的区别的。

youdao

In order to know your destiny, you have to know your talents and decide how to use them.

为了知道你的命运，你必须了解你的才能和决定怎样去使用它们。

youdao

If the voters do not know how to use a computer, how do you expect them to finish the voting process through computers?

如果选民不知道如何使用电脑，你怎能期望他们通过电脑完成投票过程？

youdao

"People can look at things and be curious about them, but if you are an explorer you want to know why and how and maybe develop an experiment to test the hypothesis."

VOA: standard.2010.06.21

The question becomes how did you address these issues How do you know about them.

这样一来问题就变成了你怎么处理这些问题,以及你对它们了解多少。

麻省理工公开课 - 媒体、教育、市场课程节选

And, we'll tell you all you need to know except for how to draw them.

我会对他们一一详解,然不包括怎么去画。

麻省理工公开课 - 固态化学导论课程节选

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