1、A cold is a respiratory infection caused by one of hundreds of possible viruses.
感冒是一種呼吸道感染的病毒可能造成數(shù)百之一。

2、Repeated respiratory infection is the common disease in paediatric clinic.
反復呼吸道感染是兒科的常見病。

3、And the most pathogeny of fever are acute upper respiratory infection and acute gastritis.
發(fā)熱患者以本市年輕人多見，最常見病因為急性上呼吸道感染和急性胃腸炎。