Acute sinusitis is usually initiated by an acute respiratory tract infection of viral etiology.

急性鼻窦炎常常是由病毒性病因的急性呼吸道感染而发生.

辞典例句

Objectives To study the viral etiology of acute respiratory tract infection ( ALRTI ) of children in Shanghai.

目的了解上海地区急性下呼吸道感染 ( ALRTI ) 患儿病毒感染病原体的现状.

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