每使用一次信用卡，就增加了信用卡号码被欺诈使用的机会。

Every time you use a credit card, you increase the chances of that card number being used fraudulently.

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不过，光合作用的活性非常强烈，催化剂每使用三十分钟就会被分解。

Photosynthesis, though, is so violently reactive that the catalysts involved break down every 30 minutes.

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会费约为10美元或者20美元，由雇主和雇员共同承担。 非会员每使用一次，需支付50美元。

There is a $10 or $20 co-payment fee for members, and nonmembers can use the services for $50 per session.

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And the prefactor is 96.3 3 when you want to get a result in kilojoules per mole.

当使用千焦每摩表示键能3,时前因子为96。

麻省理工公开课 - 固态化学导论课程节选

And if you use these three agencies, then everyone would be approved by the regulators.

如果你使用这三个评级公司，每项贷款都能获政府通过。

斯坦福公开课 - 经济学课程节选

Think, in "Birches," of really the extraordinary play of language, the freedom of association, all of which is being played off of the strict demands of the meter, at every moment.

想想，“桦树“，是无与伦比的对语言的把玩，自由的结合，所有这些都在格律诗严格的要求下自由地被使用着，每时每刻。

耶鲁公开课 - 现代诗歌课程节选