不得而知 的释义 | Babel Free
pu⁵¹ tɤ³⁵ ˀɤɻ³⁵ ʈ͡ʂʐ̩⁵⁵释义
to be unable to know or find out; to remain unknown; to be unable to ascertain
idiomatic
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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