bubble level

例句：

1. 1. Theengineer used a bubble level to check theaccuracy of the measurements.
   工程师使用气泡水平来检查测量的准确性。
2. 2. The car'sengine was running at a bubble level,indicating that it was not overheating.
   汽车的发动机运行在气泡水平，表明它没有过热。
3. 3. The doctor adjusted thepatient's oxygen levels to maintain abubble level in the lungs.
   医生调整患者的氧气水平，以保持肺部的气泡水平。