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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
Michelle and her friends are at the aquarium in Brooklyn.
Michelle和她的朋友们在参观 Brooklyn的水族馆。
Have but few frieds,though many acquaintances.
结交可以多，朋友应宜少。
In my opinion, we should buy the IBM PC 586.
我认为我们应该买IBM586微机。