During the time she is paired to a male, the female allows no other males to copulate with her.

雌性与一雄性配对时，雌性不允许其他雄性与其交配。

《柯林斯英汉双解大词典》

I HAD never given much thought to how dolphins copulate, much less seen them doing it.

我从来没有如此关注过海豚的繁殖，因为几乎看不到它们繁殖的过程。

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