Vaccinology
n. 疫苗（接种）学
🗣️ 情景例句
I've never been there, Robbie,
我从来没有去过那儿， Robbie
A fault confessed is half redressed.
承认错误，等于改正一半。
Hi, Sam! How are you today?
嗨，山姆！你今天好吗？