lube fraction

例句：

1. 1. The machine requires lube toensure smooth operation.
   这台机器需要润滑油以确保顺畅运行。
2. 2. Lube is essential for preventingwear and tear on moving parts.
   润滑油对于防止移动部件磨损至关重要。
3. 3. The techniciancarefully measured the lubefraction before starting the engine.
   技术人员在启动发动机前仔细测量了润滑油分数。