sexual intercourse

常见例句

They were told to use the gels twelve hours before sexual intercourse and again within twelve hours after sex.
Virginity is that bodily state that predates an act of sexual intercourse and therefore, at least for most of Milton's contemporaries, that is the bodily state that predates marriage.
童贞就是身体还没有进行过性行为,因此至少对很多弥尔顿的同代人来说，那种身体状态是要一直保留到结婚的。
耶鲁公开课 - 弥尔顿课程节选

The assitant attorney general started to say, no, no, just sexual intercourse is at issue.
NPR: Slate's Jurisprudence: Kansas Sex Ban Challenged
According to medical reports, the incidence of pregnancy for one-time unprotected sexual intercourse is 5%.
FORBES: Republican Senate Nominee Todd Akin: Victims Of "Legitimate Rape" Don't Get Pregnant
For example, how many times have you heard that sexual intercourse is a great way to burn calories?
FORBES: Sorry, You Can't Sex Yourself Thin (But You Can Kill Your Sex Life with Fat)