surface barrier detector

例句：

1. 1.The surface barrier detector was used to detect the presence of pollutants in the air.
   表面屏障探测器用于检测空气中污染物的存在。
2. 2.The surface barrier detector helped us to identify the source of the leak.
   表面屏障探测器帮助我们确定了泄漏的来源。
3. 3. The surface barrier detector was crucial in preventing the spread of disease.
   表面屏障探测器在防止疾病传播中起到了关键作用。