What is the rationale behind these new exams?

这些新测试的理论依据是什么？

《牛津词典》

It is a matter of the utmost urgency to find out what has happened to these people.

当务之急是弄清楚这些人出了什么事。

《柯林斯英汉双解大词典》

What is the significance of these zones?

这些区域的意义是什么？

youdao

We also agree that what the government is trying to do is get these states back into their correct relation.

VOA: special.2009.12.31

So what they do is, they're describing how these thermodynamic properties change, in terms of only state functions and state variables.

他们的作用是描述,随着状态函数和状态变量的变化，系统的热力性质如何变化。

麻省理工公开课 - 热力学与动力学课程节选

And so what happens when we remove these stops is that the piston slams up against the next pair of stops.

把挡板移开后活塞会,向上移动直道第二个挡板处。

麻省理工公开课 - 热力学与动力学课程节选

If you want to understand why American youth sports is what it is these days, you can, of course, read this blog.

FORBES: 5 Youth Sports Books You Should Read -- Even If You're Not A Parent

Which is what he is doing these days, as always.

FORBES: Lord of the Rigs

That still leaves the problem of what it is these more educated and motivated young people will actually do in their working lives.

FORBES: Left Out in the Cold