breathing system

• 呼吸系统

breathing system的用法和样例：

例句

1. Secondhand smoke also causes breathing infections in young children.
   二手烟也导致青少年呼吸系统感染。
2. One possible reason is that dust can affect the breathing system and people may be more open to infection.
   原因之一可能是尘埃会影响呼吸系统以及人们的户外活动多，因而感染病毒。