寒武紀
释义
古生代的第一紀(約5.388億年前至4.854億年前期間)
等义词
12 more languages
CEFR 等级
C2
精通
该词属于CEFR C2词汇——精通水平。
该词属于CEFR C2词汇——精通水平。
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