pure oil flow

例句：

1. 1. The pure oil flow is essential for the engine's operation.
   纯油流动对于发动机的运行至关重要。
2. 2.The pure oil flow helps to prevent wear and tear on the engine.
   纯油流动有助于防止发动机磨损。
3. 3. The pure oil flow is measured by a specialized device.
   纯油流动通过一种专门的设备进行测量。