以下为句子列表：
英文: Also, 400,000 students between 18 and 24 years old reported having had unprotected sex as a result of drinking.
中文: 此外由于酒后失控，有40万名年龄在18至24岁的学生在没有任何安全措施的情况下发生过性行为。
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英文: Black said HIV-infected couples who want to conceive, but cannot afford sperm washing or artificial insemination, should be advised to take ARVs and limit unprotected sex to the one or two days in the woman's cycle when she is most fertile.
中文: 布莱克表示，想生育但又无法支付精子洗涤或人工授精的HIV感染夫妇应服用抗反转录病毒药，并将无防护措施的性行为限制在妇女生理周期中最易受孕的1-2天里。
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英文: Critics have suggested that the sex abstinence programs could result in children engaging in unprotected sex in larger numbers.
中文: 而批评家们已经暗示性节制项目可能导致青少年大量的无防护性行为。
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英文: Some wives continued to have unprotected sex even though they knew their husbands were having affairs.
中文: 有些妇女即使知道丈夫出外寻花问柳，做爱时依然不采取防御措施。
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英文: Teens smoke, take drugs, have unprotected sex and ride with drunk drivers, not because they think they are invulnerable or haven't thought about the risks, says a new Cornell study.
中文: 康乃尔大学的一项新的研究表明，青少年热衷于吸烟、吸毒、无保护性交以及酒后驾车，并非因为他们认为他们不会受伤害或他们没有考虑到其危险性。
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