secondary bud副芽
secondaryadj.次要的;从属的;中等教育的n.副手;次要位置
secondary smoking被动吸烟
secondary biomass二次生物质
secondary solvent二级溶剂,辅助溶剂
secondary circuit次级电路,二次电路,次要电路
secondary torsion继发扭转, 假扭转
secondary imaging二次成像
secondary cyclone副气旋
secondary haulage次要运输,转运运输
secondary cluster二次簇
secondary culvert副涵洞