piston

名词

1. 1

   活塞

   The engine lost power because one piston was badly worn.

   因为有一个活塞严重磨损，引擎动力变差了。

2. 2

   推杆、活塞杆

   She pressed the piston slowly to inject the medicine.

   她慢慢推下针筒的推杆，把药注射进去。