America's true unemployment rate may, in fact,be higher than the number provided by the Labor Department, which does not include people who searched for work in vain and have given up, or those who settled for part-time work.

VOA: standard.2009.07.02

I work for the park's department. I do maintenance.

我在公园的一个部门工作。我负责维护工作。

在梅可姆公园 - SpeakingMax英语口语达人

It was invented by a mathematician called Bellman. And he was at the time being paid by the Defense Department to work on something else. And he didn't want them to know what he was doing. So he made up a name that he was sure they would have no clue what it meant.

一点儿道理也没有,它是一个叫Bellman的数学家发明的,那时受聘于国防部研究一些其它东西,它不想让它们知道她在研究什么,所以它编造了一个,它们不会知道意义的词语。

麻省理工公开课 - 计算机科学及编程导论课程节选