fuel and lubricant

例句：

1. 1. The engine needs to be regularly checkedfor proper fuel and lubrication.
   发动机需要定期检查，确保有适当的燃料和润滑。
2. 2. The car's engine isrunning smoothly with the right amount of fueland lubricant.
   汽车的发动机运行顺畅，有足够的燃料和润滑油。
3. 3. Thetechnician replaced the old oil and lubricant with new ones to ensure optimalperformance.
   技术人员用新的油和润滑油替换了旧的，以确保最佳性能。