单配偶的灵长类动物只有两种，其中一种就是伶猴，另一种是长臂猿。

Titi monkeys are one of the only species of primate that are monogamous, gibbons being one of the only other ones.

youdao

单配偶的灵长类动物只有两种，其中一种就是伶猴，另一种是长臂猿。

Titi monkeys are one of the only species of primate that are monogamous, gibbons being one of the only other ones.

youdao