There is only one known species of primate that still has a functioning third eyelid, and that is the Calabar angwantibo (closely related to lorises) which lives in West Africa.
半月皱襞是长在耳朵
部和中部
接处的一个很小的细长瘤。
There is only one known species of primate that still has a functioning third eyelid, and that is the Calabar angwantibo (closely related to lorises) which lives in West Africa.
半月皱襞是长在耳朵部和中部接处的一个很小的细长瘤。
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