1. 性交：coincidence learning一致學習 一致學習 | coition 性交 | coitophobia 恐性交症
2. 交 合：性 交 Sexual intercourse | 交 合 Coition | 开 苞 Depucelation;defloration
3. 交配：并发指数 coincidence index | 共整合子 cointegrate | 交配 coition
4. 同上：Serving as toilet(作为厕所服伺/给主人当厕所) | Coition 同上 | Copulation 交配
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: sexual intercourseintercoursesex actcopulationcoitussexual congresscongresssexual relationrelationcarnal knowledge