valve hummer

例句：

1. 1. The valve hummed as the engine started up.
   随着引擎启动，阀门发出了嗡嗡声。
2. 2. The valvehummer was a constant source of noisein the workshop.
   阀门嗡嗡声是车间里不断产生噪音的来源。
3. 3. Theengineer had to adjust thevalve hummer to compensate forthe leak.
   工程师不得不调整阀门嗡嗡声来补偿泄漏。