boundary-layer photocell

例句：

1. 1. The boundarylayer photocell is used to measure the airflow speed in a specific area.
   边界层光电管用于测量特定区域内的空气流速。
2. 2.The boundary layer photocell is crucial for detecting early signs of pollution in industrial areas.
   边界层光电管对于检测工业区早期污染迹象至关重要。
3. 3. The boundary layer photocell is an essential tool for monitoring air quality in urban environments.
   边界层光电管是监测城市环境中空气质量的必备工具。