n.润滑能力；不稳定（性），狡猾；难以捉摸

原形：lubricity复数：lubricities

The lubricity of the oil was excellent, ensuring smooth operation of the engine.
这种油的润滑性极好，确保了发动机的平稳运行。
The new formula for the brake fluid improved its lubricity and reduced wear on the system.
刹车液的新配方提高了其润滑性，减少了系统磨损。
The researchers are studying the effect of temperature on the lubricity of different types of greases.
研究人员正在研究温度对不同类型的油脂润滑性的影响。
In order to reduce friction, we need a material with high lubricity.
为了减少摩擦，我们需要一种高润滑性的材料。
The addition of molybdenum disulfide improved the lubricity of the metal surface.
添加二硫化钼提高了金属表面的润滑性。
Lubricity is an important factor in determining the efficiency of a machine.
润滑性是决定机器效率的重要因素。
The low lubricity of the fuel caused increased wear on the injectors.
燃料的低润滑性导致喷射器磨损增加。
By optimizing the lubricity of the gearbox, we can extend its lifespan and improve performance.
通过优化齿轮箱的润滑性，我们可以延长其使用寿命并提高性能。
The poor lubricity of the bearings led to excessive heat generation and eventual failure.
轴承的低润滑性导致过热和最终失效。
The surface treatment enhanced the lubricity of the polymer, making it suitable for use in high-speed applications.
表面处理增强了聚合物的润滑性，使其适用于高速应用。