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
coitus的用法和样例:
例句
用作名词 (n.)
The vagina receives the penis during coitus. 阴道在性交过程中容纳阴茎。
Reaching orgasm long after the beginning of coitus is a common male dysfunction. 性交长久以后才达到性高潮是男性常见的性功能障碍。