Safety is the prime factor to consider when people choose where to travel.

出行旅游要考虑诸多因素，其中安全是最重要的。

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A prime factor DFT Algorithm for 840 Complex data is presented in this paper.

本文推导了840点素因数分解的离散傅里叶交换的算法。

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The pore structure is the prime factor which will decide the performance of carbon membrane.

炭膜的孔结构是影响炭膜性能的根本性因素。

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Mr Yushchenko's ongoing rivalry with Ukrainian Prime Minister Yulia Tymoshenko - a former ally - is another factor.

BBC: Strategy behind Europe's gas game

Politics is a family business in Greece: Costas Karamanlis, the New Democracy leader, is the nephew and namesake of a respected prime minister, and even reformers seem to find that the dynastic factor still counts.

ECONOMIST: Greek politics

Given the relatively small form factor of most smartphones, ads that are displayed during app usage are prime candidates for accidental clicks.

FORBES: How To: Advertising On An Intimate Device