fitting lubricant

例句：

1. 1.The car needs a fitting lubricant to keep it running smoothly.
   这辆车需要合适的润滑油来保持顺畅运行。
2. 2. The engineer used a fitting lubricant to make the machine run more efficiently.
   工程师使用合适的润滑油使机器运行得更加高效。
3. 3.He applied a fitting lubricant to the gears to prevent them from seizing up.
   他给齿轮涂上合适的润滑油以防止它们卡住。