第四纪 (第四紀) dìsìjì
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              dìsìjì 
              proper noun 
              Quaternary 
 Domain: Modern Chinese 现代汉语 , Subdomain: Geography , Concept: Geological Period 地质年代
 Notes: (CC-CEDICT '第四紀')
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              dìsìjì 
              set phrase 
              fourth period 
 Domain: Modern Chinese 现代汉语 , Subdomain: Time
 Notes: (CC-CEDICT '第四紀')