environmental gas chromatograph

例句：

1. 1.The environmental gas chromatograph was used to analyze the air quality in the city.
   环境气体色谱仪被用来分析城市的空气质量。
2. 2.The environmental gas chromatograph detected the presence of harmful chemicals in the water.
   环境气体色谱仪检测到了水中有害化学物质的存在。
3. 3. The environmental gas chromatograph helped scientists to identify the sources of pollution in the area.
   环境气体色谱仪帮助科学家确定了该地区污染的来源。