Cách sử dụng
A lubricant is a substance that reduces friction between two surfaces. It can be used in many different situations, such as when you need to make something move more smoothly or when you want to protect a surface from damage. One common example of a lubricant is oil, which is used to keep car engines running smoothly. Another example is grease, which is used to make sure that mechanical parts in machines work properly. So, if you hear someone talking about a lubricant, they are probably referring to a substance that makes something work better or last longer.