air sample

例句：

1. 1.The scientist collected air samples from the mountain to study the pollution levels.
   科学家从山上收集空气样本来研究污染水平。
2. 2.The research team used air samples to analyze the composition of the atmosphere.
   研究小组使用空气样本来分析大气的成分。
3. 3. Air samples were sent to a lab for analysis, revealing that the levels of pollutants had increased.
   空气样本被送往实验室进行分析，结果显示污染物的水平增加了。