Words and Expressions 18.terminology n.专门名词，术语，词汇 the terminology of engineering工程学术语 chemical terminology化学术语 19.volatile a.挥发性的，易挥发的 volatile matter 挥发物 the ups and downs of volatile stocks. 易波动的股票沉浮 20.solute r.溶解物，溶质 volatile solute 挥发溶质 2L.solvent n.溶剂，基本组分19. volatile a. 挥发性的, 易挥发的 volatile matter 挥发物 the ups and downs of volatile stocks. 易波动的股票沉浮 20. solute n.溶解物, 溶质 volatile solute 挥发溶质 2l. solvent n.溶剂, 基本组分 Words and Expressions 18. terminology n. 专门名词 , 术语 , 词汇 the terminology of engineering 工程学术语 chemical terminology 化学术语