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Dictionary Lookup:
白
垩
纪
-
第
三
纪
灭
绝
事
件
bái è jì dì sān jì miè jué shì jiàn
Character Info:
白
垩
纪
-
第
三
纪
灭
绝
事
件
English definitions:
Cretaceous–Tertiary extinction event
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