单词	谱带系
释义	谱带系band series
随便看	natural predisposition natural predisposition--diathesy-- congenital predisposition natural pressure cycle natural process natural process limit natural product natural productions natural products natural profile natural projection natural proportional limit natural protein fibre natural pruning natural punishment natural radiation natural radiation source natural radioactive decay natural radioactive decay series natural radioactive element natural radioactive elements natural radioactive isotope natural radioactive nuclide natural radioactivity natural radioactivity background natural radioactivity--background