Following the Moscow bombings, some international security experts say this kind of violence cannot be permanently stopped.

VOA: special.2010.04.03

In this worldview, institutions--human institutions evolve only slowly over time and cannot be altered by abrupt human interventions.

在这个世界观里,制度尤其人文制度,发展得非常缓慢,而且不会被突然的人为干预改变

耶鲁公开课 - 美国内战与重建课程节选

And just to give you a sense, if you do a cross-cut of this, you cannot show it from this angle, but it should really be sort of a dumbbell shape with the nodal plane in between the two nuclei.

告诉你们这些就是给你们点概念，假如你们把他横切切开，不能从角度上展示，但它还是会保留几分哑铃的形态,以及在两核之间的节面。

麻省理工公开课 - 固态化学导论课程节选

This is foolish. They cannot be ambassadors.

VOA: special.2009.07.23

I will be happy to admit that I read through this I probably cannot tell you what it did unless I really obsessed over these details.

我不得不承认，恐怕我读完后,也不能告诉你它都干了些什么,除非我完完全全被这些细节给迷住了。

哈佛公开课 - 计算机科学课程节选

Now my call to every Senator, as well as to every American,is this: We cannot be afraid of the future.

VOA: standard.2009.06.27

But,he says,we cannot accept that an Iraqi reporter be treated like this, especially since we are a fledgling democracy.

VOA: standard.2009.03.12

"Pakistan is absolutely certain that this war cannot be won by military force alone.

VOA: standard.2009.03.26

Michael O'Hanlon of the Brookings Institution. "This kind of violence cannot be permanently stopped, and that we may be living with this for the rest of our lifetimes."

VOA: standard.2010.03.30

"There are opportunities for small farmers in Africa in this market for some tropical products that cannot be grown in North America or Europe, for example products like organic cocoa or organic sugar,organic fruits and vegetables."

VOA: standard.2010.04.11

"So there's a big question mark,". "Who is responsible for such a heavy increase of production and export of the narcotics, because all of the areas where this cultivation is underway are controlled by NATO forces in one way or other?" Akhonzadeh said this reality cannot be ignored and called for new ideas,strategies and methods to tackle the problems of Afghanistan.

VOA: standard.2009.03.27