I think we need a whole electricity distribution system, which is more efficient and bigger, more flexible and more appropriate than we have.

我们需要一个更加有效,更加庞大，更加灵活的配电系统，的配电系统。

斯坦福公开课 - 经济学课程节选

because it is a business you can get into with a schedule that's flexible.

因为那个工作时间很灵活。

旧金山的调酒师 - SpeakingMax英语口语达人

And I try to imagine, well, first, imagine being really, really stiff, because you're not flexible when you're a ball point pen.

让我试着想象，首先，想象自己变得非常僵硬，因为圆珠笔是不会动的。

耶鲁公开课 - 死亡课程节选