It is a job that required attention and caution, but he cannot keep his attention on the machines, because he has problems at home.

工作要求他得时时聚精会神、小心谨慎，但他不能把注意力放在机器上，因为他家里出了一些问题。

youdao

But he cannot catch little Pearl!

可他抓不住小珠儿！

youdao

But he cannot force the states to stop doing it.

但是他也不能强制各州停止限制。

youdao

But he cannot get beyond the first line of his book.

VOA: special.2009.10.25

He says--and here's that Yeatsian word "all" again--he says: When I try to put all into a phrase I say, "Man can embody truth but he cannot know it."

他说，又是他涵盖一切的词：,当我想用一句话概括时，我说，人可以表现他不理解的真理“

耶鲁公开课 - 现代诗歌课程节选

He's saying they're doing great work but they forget this one little thing: you cannot reconcile rhetoric and grammar.

他说的是，他们做得非常好,但是他们忘记了一个小问题，修辞和语法是不可能和解的。

耶鲁公开课 - 文学理论导论课程节选

Barack Obama may have beaten the Clinton machine, but he cannot escape the Clinton factor.

BBC: The Obama-Clinton political dance

But he cannot be sure that the commission's recommendations will conform to the government's modest wishes.

ECONOMIST: Lords reform

There will be twists and turns along the way, but he cannot do this alone.

WHITEHOUSE: Remarks by the First Lady at a Campaign Event