Vaccinology
n. 疫苗（接种）学
🗣️ 情景例句
How do you feel about the last part of the letter?
你对最后一部分有什么看法呢？
It's on of his favorite relaxations.
这是他最喜欢的消遣之一。
Oh, and by the way, my wife wants to know if Mary needs any help.
喔，顺便问一问，我妻子想知道玛丽是否需要帮忙。