So, a couple of weeks ago we proposed to swap two integers, and we couldn't at the time.

那么，几周前，我们提出交换两个整数，然而在那时，我们办不到。

哈佛公开课 - 计算机科学课程节选

Pompey had cleared the Mediterranean of pirates, which is something that our governments can't seem to do.

庞贝清除了地中海的海盗，这点我们政府似乎办不到。

耶鲁公开课 - 新约课程节选

Rather than the military's power that does nothing but focuses on where is the next war.

军事力量则不同,除了带给我们下一场战争，什么也办不到。

普林斯顿公开课 - 国际座谈会课程节选