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vi. 【生物学、医学】血清转化, 对疫苗产生抗体
🗣️ 情景例句
Don't be mixed up in such business.
不要跟这种事有所关连。
Just a second. I'll have to check.
等一等。我得查一查。
Mum and Dad were not at home.
爸爸妈妈不在家。