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N an act of sexual intercourse or sodomy performed without the use of a condom, thus involving the risk of sexually transmitted diseases 无防护措施的性行为
You are playing Russian roulette every time you have unprotected sex.
每次你进行无保护措施的性爱都是在冒不可预料的风险。
《柯林斯英汉双解大词典》
These women must be available for work and they must provide all services, including unprotected sex.
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Hispanic and black women were more likely than whites to report using the drug after unprotected sex.
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The Australian is also accused of having unprotected sex with another woman, Miss W, while she was asleep.
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