单词	lower respiratory tract
释义	lower respiratory tract noun plural lower respiratory tracts : the part of the respiratory tract including the trachea, bronchi, and lungs compare upper respiratory tract Word History First Known Use 1881, in the meaning defined above Medical Definition lower respiratory tract noun : the part of the respiratory tract including the trachea, larynx, trachea, bronchi, and lungs compare upper respiratory tract
随便看	split levels split link split lug split moss split nut split on split one's sides split page split pattern split pea split personality split phase split pin split pit split platen split pulley split rail split rigger split ring split rivet split roof split run split scene split screen split seconds

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