dental engine cord

例句：

1. 1. Thedental engine cord is essential for the dentist's work.
   牙科引擎线对于牙医的工作至关重要。
2. 2. The dental engine cord wasdamaged during the surgery.
   手术中牙科引擎线受损了。
3. 3. The dentist used the dentalengine cord to remove the tooth.
   牙医使用牙科引擎线来拔牙。