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单词	uropygial gland
释义	u·ro·py·gi·al gland (yr′ə-pījē-əl, -pĭjē-) n. A large gland at the base of a bird's tail that secretes an oil used in preening. Also called oil gland.
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英语词典包含135693条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。