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震旦纪
震旦纪
震旦紀
zhèn
dàn
jì
ㄓㄣˋ ㄉㄢˋ ㄐㄧˋ
N
⇄ compare
1
Sinian (c. 800-542 million years ago), late phase of pre-Cambrian geological era
Characters
震
旦
纪