二疊紀 的释义 | Babel Free
ˀɤɻ⁵¹ ti̯ɛ³⁵ t͡ɕi⁵¹释义
古生代的第六紀(約2.99億年前至2.51億年前期間)
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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