常見(jiàn)例句雙語(yǔ)例句Chronic cough is a common respiratory symptom in children.慢性咳嗽是兒童呼吸系統(tǒng)常見(jiàn)的癥狀。Avian influenza with low virulence is characterized by respiratory symptom and low productirty.低致病力禽流感常引起呼吸道癥狀，產(chǎn)蛋量下降。Avian influenza with low virulence was characterized by respiratory symptom and low productirity.低致病力禽流感常引起呼吸道癥狀，產(chǎn)蛋量下降。 返回 respiratory symptom