英语词汇respiratory tract是什么意思，respiratory tract的用法、释义、翻译、读音、例句、短语词组-英汉汉英翻译词典

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单词	respiratory tract
释义	USCA
随便看	urea formaldehyde plastics urea frost urea furan resin urea hydrochloride urea hydrolyser urea lumps separator urea nitrate urea peroxide urea phosphate urea plant urea plastic urea plastic molding compound urea plastic moulding compound urea plastics urea resin urea solution filter urea solution pump urea solution tank urea stibamine urea synthesis urea unit urea- urea-ammonium phosphate urea-formal dehyde resin urea-formaldehyde foam