To influence events, you need not know the causes.

要影响事件，你没需要知道起因。

youdao

You need not know any special programming language, but you must know one object oriented language.

不知道你需要任何特殊的编程语言，但是你必须知道一个面向对象的语言。

youdao

If you plan properly, you'll know that you only need, say, 350g of beef and six rashers of bacon, not whatever weight is prepacked in the supermarket chiller.

例如，如果你计划得当，你就会知道你只需要350克的牛肉和6薄片培根，而不是超市冷冻柜里预先包装好的任何重量的食材。

youdao

"But the important question is whether or not you need that information and our view very strongly is that,you know, all of that type of information that is relevant to the conservation and management of whales can be gathered using new and very powerful non-lethal tools."

VOA: standard.2010.01.05

We need not just that you're all rational players, not just that you know each other's rational, but you know everyone else's rational.

不仅需要你们都是理性的参与人,不仅需要你们知道对方是理性的,而且必须知道所有人都是理性的

耶鲁公开课 - 博弈论课程节选

It does not take one to know one; to understand the truths about the French, you do not yourself need to be French.

这不需要同类互知,你不需要是法国人,才能了解法国人

耶鲁公开课 - 死亡课程节选

You may not know what you need to know until you try something.

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If you can't access it when you need it, you might as well not know it at all.

CNN: Become a 'Mastermind' with Sherlock Holmes' help

You need to learn them if you do not know what they are.

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