Remember, you need to know this before you start.

在开始之前，需要知道这一点。

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If you are burning cash, you need to know this number by heart as well.

如果你在烧钱，你就要好好记住这个数字。

youdao

You need to know this because without it, you can't get clarity about what you want.

要是你连这些都不知道，你就想不清楚你自己到底想要什么。

youdao

And so frankly this is pretty much all you need to know with Nano to get up and running.

坦白说，你们只需要知道,这些东西就可以了。

哈佛公开课 - 计算机科学课程节选

Now the question you'd need to ask yourself is how do you know this didn't happen to you last night?

现在你要问自己的问题是,你怎么知道,昨晚你没发生这样的事？

耶鲁公开课 - 死亡课程节选

To approach this, you'll need to know a little bit about meter.

为了达到这个你需要稍微了解一下韵律。

耶鲁公开课 - 现代诗歌课程节选

You need to know this and have an opinion as to financial sector staying power.

FORBES: Deathtraps In The World's Bourses

This will tell you all you need to know about this election.

WHITEHOUSE: The White House

That tells you everything you need to know about this government's values.

BBC: Food banks used by thousands of jobless, figures show