每次你进行无保护措施的性爱都是在冒不可预料的风险。

You are playing Russian roulette every time you have unprotected sex.

《柯林斯英汉双解大词典》

他不想和英格丽德有性爱关系。

He was not interested in a romantic relationship with Ingrid.

《柯林斯英汉双解大词典》

电影和书籍中露骨的性爱场景在旧体制下是禁忌的。

Sexually explicit scenes in movies and books were taboo under the old regime.

《柯林斯英汉双解大词典》

I've done a great deal of work on love and sex, and now have written at least eight books.

我大量研究爱情与性爱，到现在写了至少八本书了。

麻省理工公开课 - 电影哲学课程节选

So this is where you'd go to relax, to make a business deal, to meet your friends, to chat, to try to have sex, try to meet somebody.

人们可以在那儿得到放松，谈谈生意，见见朋友，聊天，性爱，约会。

耶鲁公开课 - 新约课程节选

Sex is really strange You ask people, ?" "What's your favorite activity?"

性爱是件很奇怪的事,如果你问别人，“你最喜欢做的事是什么“

耶鲁公开课 - 心理学导论课程节选