What does the brain do while we are sleeping?

当我们睡觉时，大脑在做什么？

youdao

What do people tend to do while engaging in a conversation?

人们在交谈时倾向于做什么？

youdao

There is absolutely nothing you can do while this is going on but keep both eyes fixed on the sink until it's full.

在这个过程中，你除了一直盯着水槽直到它满了以外，你什么也做不了。

youdao

While they were in the brain-scanning machine, they were asked to do tasks that required concentration and attention.

VOA: standard.2009.12.19

Video on-demand has to do with the delivery what they call content, while the video phone is the deliver of person-to-person communication. These are not nearly the same, but they both involve video.

随需视频必须与传送他们所称的“内容“相关,而视频电话是一种,个人对个人的传送，那不是,大致相同的，但它们都包含视频。

麻省理工公开课 - 媒体、教育、市场课程节选

Dollet adds that while there are other Arabic-speaking countries that do not control the Internet as much as Egypt, it is not clear how long that relative freedom will last.

VOA: standard.2009.11.16

Is it really politically necessary for Obama to avoid visiting mosques -- something that President Bush has dared to do -- while rallying support from churches and synagogues?

CNN: Commentary: Candidates should seek votes of Muslim-Americans

They could do what the Democrats allege: Scale back tax preferences in such a way that middle-income households pay higher taxes than they do today while high-income people enjoy a tax cut.

FORBES: Paul Ryan's Budget: Fact, Fiction And The Hole The House GOP Has Put Itself In

She calls it a must-do activity while in Costa Rica.

CNN: Costa Rica's oasis