levelset水平集leveln.数量；等级；水平；水平线adj.平的；等高的v.弄平；夷平；对准adv.<废>水平地level droughty water level枯水位Level out in the playfield公平竞争level displacement shifter电平位移器level of energy dependency能源依存性leveler of rates of profit利率相等level-crossing collision平交道口撞车leveled model of education分层次教学level adjusting attenuator电平调整衰减器leveller of existing track已存线水准测量level-to-level teaching分级教学