Bruce Katz of Brookings says cities can no longer afford to compete with each other, but must work together in order to thrive economically.

布鲁金斯学会的布鲁斯。卡慈表示城市间再也经不起相互之间的竞争了。相要实现经济上的繁荣，必须联起手来一起努力。

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It's Tiffanie Standard, a counselor for young women of color in Philadelphia who want to be tech entrepreneurs—but who must work multiple jobs to stay afloat.

蒂法尼·斯坦达德在费城是一名顾问，她向有志成为科技企业家的有色人种女士提供服务，但是她需要身兼数职才能维持生计。

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Lab work is fun but you must be careful.

在实验室的工作很有趣，但你必须小心。

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But people who work with adobe must experiment.

VOA: special.2009.01.12

But it's a good story, Joule decided that there must be a direct relationship between work and heat.

所以说，这只是一个不错的故事而已，焦耳认为功和热之间,一定具有某种直接的联系。

麻省理工公开课 - 热力学与动力学课程节选

But these states have a Protestant work ethic: we'll help you find a job, they say, but you must work if you can.

ECONOMIST: Charlemagne

They have the right to enter France without a visa but must have work or residency permits to settle over the long-term.

BBC: France rounds up hundreds of Roma

They have the right to enter France without a visa, but must have work or residency permits to settle over the long term.

BBC: Roma protest blocks French bridge