Seroconverters
(seroconverter 的复数) vi. 【生物学、医学】血清转化, 对疫苗产生抗体
🗣️ 情景例句
so it's my pleasure
所以现在我很乐意
He alone is poor who does not possess knowledge.
没有知识，才是贫穷。
When he died, however, his brothers found it impossible to keep the secret any longer.
他死后，他的弟弟们才觉得无法再保守这个秘密了。