事半功倍 的释义 | Babel Free
ʂʐ̩⁵¹⁻⁵³ pän⁵¹ kʊŋ⁵⁵ peɪ̯⁵¹CEFR 等级
B1
中级
该词属于CEFR B1词汇——中级水平。
该词属于CEFR B1词汇——中级水平。
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