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
在耳朵上部和中部连接处的一个很小的
。
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.
半月皱襞是在耳朵上部和中部连接处的一个很小的。
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