Cách sử dụng
The word 'dross' is used to refer to something that is worthless, undesirable or of low quality. It is often used in the context of purifying precious metals where dross is the impurities that are separated from the metal. In everyday language, it can refer to any useless or unwanted material, opinions, ideas or people. For example, "The essay was full of dross and lacked any substance".