Cleaning and polishing , lubricating , and replacing filters , tuning the engine , and replacing worn brake and clutch linings are some of the normal maintenance services all cars require .
清洁抛光,上润滑油,更换过滤器,调节引擎,更换磨损的刹车器和离合器衬片是所有车都需要的日常保养。
At that point they took out the kerosene lubricating their drill bit and adjusted the pressure so that none of the liquids would fall into the lake , but rather lake water would rise through the hole due to pressure from below .
Sebaceous glands secrete oil-like sebum for lubricating the hair and skin .
皮脂腺分泌油状皮脂润滑毛发和皮肤。
Although air is always present in lubricating oil , it is often justifiable to adopt measures to minimize its presence .
尽管在润滑油中经常有空气的”声影“,我们最好采取措施将其存在降低到最低。
When a lubricating oil becomes contaminated with water , its surface tension is lowered , thereby allowing bubbles in the oil to separate into smaller particles that are more easily suspended .