此外，人类也是同时长有阴虱和头虱的唯一一种灵长类动物。

In addition, the human is at the same time there are head lice pubis and the only primates.

youdao

所以生物学家长期为此困惑：为什么人类的头虱是黑猩猩虱子的近亲。而阴虱却是大猩猩虱子的近亲。

So biologists have long been puzzled over the fact that the human head louse is a sister species to the chimpanzee louse, but the pubic louse is closely related to the gorilla louse.

youdao

所以生物学家长期为此困惑：为什么人类的头虱是黑猩猩虱子的近亲。而阴虱却是大猩猩虱子的近亲。

So biologists have long been puzzled over the fact that the human head louse is a sister species to the chimpanzee louse, but the pubic louse is closely related to the gorilla louse.

youdao