She seemed to be unable to rouse herself to do anything.

她似乎打不起精神做任何事情。

She will be unable to attend because of a prior engagement.

因事先有别的安排，她将不能出席。

Many families on low incomes will be unable to afford to buy their own home.

许多低收入家庭根本无力购买房子。

Cullen objected that his small staff would be unable to handle the added work.

卡伦反对说，他职员少，将无法应付增多的工作。

I know even now that you will take something from the woman and be unable to save me.

我现在知道你会从这妇人手里拿走一些东西，而且你并不能救我。