And then you realize that you've put on your most expensive pair of shoes this mooring, and if you stop to take them off, it might be too late and the child might drown.

你意识到你正穿着,你最贵的一双鞋，但是，如果你停下来脱鞋，就来不及救这个小孩，小孩可能会溺死。

普林斯顿公开课 - 人性课程节选

That's probably the most expensive one that I have. But it's forever.

这大概是我纹过的最贵的了。不过它是永久的。

你如何看待纹身？ - SpeakingMax英语口语达人

Beverly Hills is part of Los Angeles; it's the most expensive city in the U.S.

比弗利山庄位于洛杉矶,是美国最贵的住宅区

耶鲁公开课 - 金融市场课程节选

Now, what do you suppose was the most expensive item on that list?

你们觉得清单里的哪一项最贵？

耶鲁公开课 - 公正课程节选