undeadj.波形的UNabbr.(=United Nations) 联合国pron.<口>人，事物，家伙，东西unladen weightn.(车辆的)自重uncropped soil裸露的unhygienicallyadv.不卫生地unguarded shot无人防守的投篮unreconcilableadj.不能和解的unpermeabilityn.不透水性unconstraining非限化undecyl ketone十一基甲酮unenthusiasticadj.不热心的；缺乏热情的undivided cell无隔膜电解槽