This might seem like the blind leading the blind - and it's hard to imagine parents at an Open Day being impressed by a university offering 5 zero contact hours.

这看起来就像外行指导外行一样，很难想象父母们会在校园开放日，对一所提供零面授课时的大学留下深刻印象。

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Participants may earn 16 contact hours of formal industrial hygiene training towards qualification to sit for the Certified industrial Hygienist (CIH) examination.

准备参加注册工业卫生师(CIH)考试的人士可能获得16小时专业学士，将有助于获得CIH考试资格。

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From this survey, one can estimate that fewer than one in five children have some contact with a hospital teacher—and that contact may be as little as two hours a day.

从这个调查中，我们可以估计不到五分之一的孩子和医院的老师有过接触——这种接触可能每天只有两个小时。

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Five hours is contact time. That's three hours here, and two hours with the recitation instructor.

联系时间是5个小时，这有三个小时，其余2小时是和背诵课的讲师。

麻省理工公开课 - 固态化学导论课程节选

If you cannot make the office hours, again, contact the recitation instructor to make other arrangements.

再次说，如果你们在办公时间不方便，联系背诵课的老师,再安排安排。

麻省理工公开课 - 固态化学导论课程节选

"We are a very tight-knit family, and it's very out of the ordinary that he would be not in contact for even 24 hours, " Ravi told WPRI.

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The risk decreases significantly after 1-3 hours after contact.

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People who need help with minor ailments or injuries have been advised to contact NHS Direct, see their local pharmacist, or contact their GP during surgery hours, or their out-of-hours GP at other times.

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