joint grease

例句：

1. 1. The mechanic used joint grease to lubricate the gears.
   机械师使用关节润滑油来润滑齿轮。
2. 2.The car was running smoothly after the mechanic added some joint grease.
   在机械师添加了一些关节润滑油后，汽车运行得非常顺畅。
3. 3. The doctor advised him to use joint grease instead of oil for his joints.
   医生建议他用关节润滑油而不是油来润滑他的关节。