leadoffn.开始；著手；第一拳leadv.引导；领先；带领；过 ... (的生活)；导致n.领头位置；主角；榜样；引言；铅lead acetotartrate乙酰酒石酸铅leadless soldering无铅焊接lead crystal glass铅晶质玻璃lead assistance tovt.帮助(支持)lead bearing waste含铅废物lead sheet roofing铅皮屋面lead chamber gases铅室气Lead concentration铅芯浓度lead a stormy life过颠沛流离的生活lead blast furnace铅鼓风炉