消退 的释义 | Babel Free
ɕi̯ɑʊ̯⁵⁵ tʰu̯eɪ̯⁵¹例句
“免疫力消退”
waning immunity
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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