to make a substance pure by taking other substances out of it 精炼；提纯；去除杂质◆The company refines crude oil from Venezuela. 这家公司提炼来自委内瑞拉的原油。◆refined products 炼制品
to improve sth by making small changes to it 改善；改进；使精炼◆The design has been refined. 这个设计已经作过改进。▸reˈfining