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 paging device辅助分页设备,二级分页装置,辅助调页设备secondary metamorphosis次级变态secondary-degree burn二度烧伤secondary standard fuel[化] 第二参比燃料secondary school leaver中学毕业生secondary myelofibrosis继发性骨髓纤维化secondary crystallinity后期结晶度secondary wound healing伤口二期愈合secondary coal recovery煤二次开采secondary-development次开发