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1.The engine needs to be cleaned and the lubrication gap checked for optimal performance.
发动机需要清洁，并检查润滑间隙以获得最佳性能。
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2. During maintenance, the technician carefully removed the old oil and replaced it with fresh lubricant to ensure proper lubrication gap.
在维护过程中，技术员小心翼翼地取出旧油并用新鲜润滑油替换，以确保适当的润滑间隙。
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3. The engineer found a significant increase in the lubrication gap between the bearings, which could lead to premature wear.
工程师发现轴承之间的润滑间隙显著增加，这可能导致过早磨损。