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
The researchers say the females may have died of stress caused by aggressive male copulation attempts. 对此，研究人员表示，雌性蜥蜴可能是由于雄性蜥蜴富有侵略性的交配行为对其产生了巨大的压力而死亡的。
The reproductive system has a complex innervation concerned in copulation and oviposition. 生殖系统有一个同交尾和产卵有关的复杂神经系统。
