Seroconversions
(seroconversion 的复数) n.[生][医]血清转化
🗣️ 情景例句
I have a ticket, I know.
我知道我有车票。
I'm afraid not. She doesn't have any openings in the morning.
恐怕不行。上午她没有空。
He told me not to bring you anything.
他吩咐我不要给你带什么东西。