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告诉他们关于性交流的技巧。
He tells her about conception, sexual intercourse, sperms and eggs.
他告诉她关于怀孕，性交以及精子和卵子的事。
If a couple practiced temperate, moderate, and more or less dispassionate acts of sexual intercourse, they could be said to remain chaste -- a married couple, of course.
如果一对夫妻有适度的，有节制的，或者多多少少不带感情的性交，可以说他们是保持了贞节--当然是一对已婚夫妻。
They were told to use the gels twelve hours before sexual intercourse and again within twelve hours after sex.
VOA: special.2010.07.21
In biblical Hebrew the word "to know" can mean "to know" in the biblical sense. It can mean sexual intercourse.
知道一词，在希伯来圣经中的意思,与圣经中一致，都是性交的意思。
Boy,you're wound awfully tight for a man who's just had sexual intercourse.
All right,well,I'll talk to you later, but I am so happy for you,Leonard.
对于一个刚进行过性交的人来说，你真是出奇的紧张啊。
好吧，下次再说吧，不过我真为你高兴，莱纳德。
Emergency contraceptives such as Plan B and Ella are taken after sexual intercourse to prevent pregnancy.
An estimated 114 million acts of sexual intercourse take place in the world every day.
"The detailed description of sexual intercourse will trigger the early attention of children about sexual activities, " she added.
CNN: Sex education causes stir in Chinese elementary schools