The hen may not be able to feed its young.

这只母鸡也许不能喂它的幼雏。

《柯林斯英汉双解大词典》

For certain personal reasons I shall not be able to attend.

由于某种个人原因，我将不能出席。

《牛津词典》

The world will not be able to support all these extra hungry mouths.

这个世界养活不起这么些额外的饥民。

《牛津词典》

Farmers may not be able to prevent natural disasters, but they can at least try their best to reduce losses.

VOA: special.2010.02.09

Now Milton may not be able to forget Homer, but he is able to correct Homer or to preempt Homer.

弥尔顿不能忘记荷马，但他可以改正荷马或者取代荷马。

耶鲁公开课 - 弥尔顿课程节选

And what I recognized was first of all, how impoverishing that was spiritually to not be able to bring my faith identity into the public square.

而我意识到,第一，我们精神上很枯竭,因为我们不能将自己的宗教身份,带入公共场所。

普林斯顿公开课 - 人性课程节选

And most of city's speed cameras will not be able to detect speeds lower than 30mph.

BBC: Brighton and Hove city centre 20mph scheme starts

Lehman might not be able to, despite the financial backstop from the Federal Reserve that continues until mid-January.

FORBES: Lehman On The Bubble

Close to a majority say we will not be able to balance the budget anytime soon.

FORBES: The Compromise That Americans Want To Break The Budget Deadlock