secondary low次生低压,副气旋,副低压secondaryadj.次要的；从属的；中等教育的n.副手；次要位置secondary oil migration油气二次运移Secondary lung diseases肺部并发症secondary auditory area二级听觉区, 次级听觉区secondary aldosteronism继发性醛固酮增多症, 继发性醛固酮症secondary porta hepatis第二肝门secondary perched river二级悬河secondary standard file[计] 二级标准文件secondary key retrieval辅助关键字检索secondary gas reservoir次生气藏secondary radiation fog继发辐射模糊