"But it cannot be," he spluttered.

“但那不可能，”他结结巴巴地说。

《柯林斯英汉双解大词典》

youdao

But it cannot walk on water.

但它还没有在水上行走的本事。

youdao

It finds nothing. The pig starts to walk away, but it cannot move its feet.

VOA: special.2010.04.07

I cannot draw it that well, but imagine bringing the second point closer and closer to the first one.

我不能很好地把它画出来,但是你们可以想象,当第二个点,越来越靠近第一个点时

耶鲁公开课 - 基础物理课程节选

But there is nothing saying you cannot take magnesium and mix it with oxygen and make magnesium oxide.

同样的道理，如果将镁,与氧一起反应，就会得到氧化镁。

麻省理工公开课 - 固态化学导论课程节选

Some tax-exempt organisations are allowed to conduct political activities, but it cannot be their primary mission.

BBC: IRS 'sorry' conservative groups subjected to extra audit

"There's an old saying that charity begins at home, but it cannot end there, " Rock said.

CNN: Telethon tries to raise 'Hope for Haiti'

It may be diligent, but it cannot be transparent, which is what people now want.

ECONOMIST: Tony Blair and Iraq