We need to know the exact time the incident occurred.

我们需要了解事情发生的确切时间。

《牛津词典》

We need to know how much of what food to eat to be healthy.

我们需要知道吃多少什么食物才能健康。

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We need to know whether the crime had been premeditated.

我们需要知道犯罪是否有预谋。

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In her words, "We need to know how using credit fits into our plans and goals."

VOA: special.2009.05.22

We need to know not only what are the primitives, but how do we make things meaningful in that language.

我们不仅需要知道什么是基本类型，还要知道我们在那种语言中,怎样使其变得有意义。

麻省理工公开课 - 计算机科学及编程导论课程节选

Also, we need to know how much individual stocks are correlated with rm; we measure that by the regression coefficient.

我们必须清楚,有多少个股与市场总体收益率相关;,我们用回归系数，即β系数来表示。

耶鲁公开课 - 金融市场课程节选

As marketers, we need to know who the brokers are and then bring them something novel.

FORBES: Connecting marketers to the Forbes audience. What is this?

Thirdly, we need to know what will be the effect of any particular temperature rise.

FORBES: Climate Change Is Now Less Of a Problem. So We Need To Do Less About Climate Change

What we need to know is this: did these seeps exist before the cap test began?

FORBES: BP Oil Seeps: Should We Be Worried?