Vaccinology
n. 疫苗（接種）學
??? 情景例句
How do you feel about the last part of the letter?
你對最后一部分有什么看法呢？
It's on of his favorite relaxations.
這是他最喜歡的消遣之一。
Oh, and by the way, my wife wants to know if Mary needs any help.
喔，順便問一問，我妻子想知道瑪麗是否需要幫忙。