Is that how important is it that we get control of that border and seal it, so to speak.

对于我们来说,控制或者是夺取这个关口，是不是很重要呢。

普林斯顿公开课 - 国际座谈会课程节选

You are the defender of this country and you have to decide which of these passes or which of these routes into the country, you're going to choose to defend.

你是国家的防御者,你必须决定在哪个进入关口,或者在哪条进军路线上,布置你的防线

耶鲁公开课 - 博弈论课程节选

So imagine the following example, an invader is thinking about invading a country, and there are two ways -- there are two passes if you like -- through which he can lead his army.

想象一下这样的例子,一个侵略者打算入侵一个国家,有两条路,想象成两个关口也行,侵略者必须通过一个才能进入

耶鲁公开课 - 博弈论课程节选