3. 七彩网·英语单词大全
1. 性关系：4. nou [情欲] sex | 性关系 : sexual intercourse | 5. nou [性质]
1. 性交;性行为;性关系
Sexual intercourse is the physical act of sex between two people.
noun
1. the act of sexual procreation between a man and a woman
the man's penis is inserted into the woman's vagina and excited until orgasm and ejaculation occur
Synonym: intercoursesex actcopulationcoituscoitionsexual congresscongresssexual relationrelationcarnal knowledge