Seroconversion
n. [生][医]血清转化
🗣️ 情景例句
We're in here, Dad.
我们在里面， 爸爸。
He can't come and he sends his apologies.
他为他的不能前来致歉。
No. It isn't real, said Meimei. It was used in plays.
“不，那不是真的，”梅梅说，“那是演戏用的。”