copulating

v.

性交，交配，交尾( copulate的现在分词 )；

1. Mary did not want to copulate with her boyfriend before marriage
   玛丽不愿在结婚前与她的男朋友发生性关系。
2. Some animals perform elaborate mating rituals before they copulate.
   有些动物在交配前要进行复杂的交欢仪式。
3. The male bird performs a sort of mating dance before copulating with the female.
   这种雄鸟在与雌鸟交尾以前要跳一种交欢舞。

Chair for copulating couples
The costs of copulating in the dung fly Sepsis cynipsea
Why do male birds stop copulating while their partners are still fertile?
Do female tree swallows guard their mates by copulating frequently?
Copulating with multiple mates enhances female fecundity but not egg-to-adult survival in the bruchid beetle Callosobruchus maculatus
Exogenous androgen activates female behavior in noncopulating, prenatally stressed male rats.
Female red-winged blackbirds accrue material benefits from copulating with extra-pair males ☆ ☆☆
Increased dopamine release in the nucleus accumbens of copulating male rats as evidenced by in vivo voltammetry
The unique pollination of Leporella fimbriata (Orchidaceae): pollination by pseudocopulating male ants (Myrmecia urens, Formicidae).
Comparative analysis of immunoreactive cells for androgen receptors and oestrogen receptor alpha in copulating and non-copulating ma...