When Ted was six we decided that he needed to know how to fasten and unfasten his seat belt.

泰德六岁时，我们决定让他知道怎样系和解他的安全带。

《柯林斯英汉双解大词典》

He needed to know.

他需要好好想想。

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But he needed to know, "Henrik, two people died today."

但他需要知道，“亨瑞克，今天两个人死了。”

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But Abraham Lincoln taught himself what he needed to know.

VOA: special.2009.02.06

It's possible that he genuinely didn't know what to do, that he wasn't smart enough to understand that he needed to point to the other one.

有可能他是真的不知道该做些什么,他还不够聪明,无法理解他需要指向另一个物体

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One friend maintains that everything he needed to know in life he learned from Hatchet by Gary Paulsen.

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From Disney, he says, everything he needed to know about how to dream (where Disney succeeded) and how to treat his employees (where he failed).

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Mr Wilson said he needed to know specifically what MLAs were prepared to accept, and he wanted to present a budget to the assembly as soon as possible.

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