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单词 nictitating membrane
释义
nictitating membranenictitating membrane /ˌnɪktəteɪt̮ɪŋ ˈmɛmbreɪn/ noun [countable] science, biology a thin transparent layer of skin that is closer to the eye than an eyelid, and that can move across the eyes of birds, reptiles, and some other animals to protect the eye SYN third eyelid
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