oxygen analyzer

例句：

1. 1. The doctor uses an oxygen analyzer to check the patient's condition.
   医生使用氧气分析仪来检查病人的状况。
2. 2.The scientist used an oxygen analyzer to detect the presence of harmful gases in the air.
   科学家使用氧气分析仪来检测空气中有害气体的存在。
3. 3. During the test, the oxygen analyzer showed that the room was well-ventilated.
   在测试期间，氧气分析仪显示房间通风良好。