Purel皮雷尔pureadj.纯的；纯洁的；纯粹的pure semiconductor纯半导体,本征半导体pure friction pile纯摩擦桩pure culture yeast纯培养酵母pure jurisprudence纯粹法学pure yeast culture纯粹酵母培养pure aluminum foil纯铝箔pure number theory纯粹数论pure birth process纯增加过程,纯生过程pure wool slippers纯羊毛拖鞋pure yeast starter纯粹酵母发酵剂