Cách sử dụng
A refiner is someone or something that purifies or makes something better. For example, a sugar refiner is a company that processes raw sugar and makes it into the white sugar we use in our food. A metal refiner is a company that transforms raw metal into a higher quality metal product. The word can also be used to describe a person who improves themselves by learning or practicing new skills, such as a musician refining their technique or a student refining their writing ability.