The process of attaining professional status is actually a ail-along focus in the study of social stratification and social mobility.

职业地位的获得过程一直以来都是社会分层与流动研究中很重要的一个焦点问题。

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You don't need to look for trouble ail the time, but if you have reason to think a coin or bill is a counterfeit, perhaps some of these tips will help you out.

你不必天天自寻麻烦去辨别真伪，但是，如果你有理由认为一枚硬币或一张钞票是假的，也许这些小小的提示将会帮助你。

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He served on the boards of several companies, including Marathon Oil, Learjet, Cinergy, Taft Broadcasting, United Airlines, Eaton Corporation, AIL Systems, Thiokol, and Space Industries International, a company that I co-founded.

FORBES: Neil Armstrong's Immortal Footprint