Do you know what they are doing?

你知道他们在做什么吗？

youdao

Do you know what they are?

你知道他们是什么吗？

youdao

Do you know what they are talking about?

你知道他们正在谈论什么吗？

youdao

Okay, first of all, because everything relies on self-report there's no machine, for the most part, that can do objective measures of this, you don't really know when people are telling you what they're eating.

好,首先,因为任何事都是建立在自觉上,大多数环节没有机器参与,这样的方式比较主观,你并不需要,人们告诉你他们所吃的是否真实

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

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

FORBES: Annual Performance Review: Time Suck or Amazing Opportunity

Sure, you can ask what they are doing to ensure availability but do you even know what the availability options are on the leading clouds and how best to leverage them?

FORBES: What are Enterprises Really Doing in the Cloud?

So everybody's coming from a united front and getting the right messages out to patients so they know in a very clear, explicit manner what you want patients to do, what they - what are these recommendations for cancer prevention?

NPR: Confronting Misconceptions About Cancer Prevention