Word: 炼 (liàn) Traditional: 煉 炼 dictionary entry liàn to refine; to smelt Full dictionary entry for 炼 Example sentences using 炼 2 sentences, showing page 1 of 1. 工厂把原油炼成汽油。 Gōngchǎng bǎ yuányóu liàn chéng qìyóu. The factory refines crude oil into gasoline. 师傅把原油炼成了汽油。 Shīfu bǎ yuányóu liàn chéng le qìyóu. The technician refined the crude oil into gasoline.