十天干 shítiāngān
          
              shítiāngān 
              
              noun 
              the ten Heavenly Stems 
              Domain: Modern Chinese 现代汉语
              
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                Notes: 甲, 乙, 丙, 丁, 戊, 己, 庚, 辛, 壬, 癸, used cyclically in the calendar and as ordinal number like Roman I, II, III (CC-CEDICT '十天干')