secondary dam副坝secondaryadj.次要的；从属的；中等教育的n.副手；次要位置secondary compounds次生物质secondary regulator副调节器,副调整器secondary character次要性状secondary aggregate二次聚集体secondary branchlet副小枝secondary potential二次电位secondary stricture次阻塞secondary ovogonium次级卵原细胞secondary resources二次资源secondary pyothorax继发脓胸