residual air

例句：

1. 1. The room was filled with residual air from the previous occupants.
   房间里充满了前一个住户留下的残余空气。
2. 2.The scientist used a special device to remove residual air from the sample.
   科学家使用一种特殊的设备来从样本中去除残余空气。
3. 3.The team worked tirelessly to remove all traces of residual air from the building.
   团队努力不懈地工作，以清除建筑物中所有残余空气的痕迹。