Retrovaccine
[医] 还原疫苗, 还原牛痘苗
🗣️ 情景例句
You are twenty-one, a grown-up young lady old enough to make up your own mind.
你已经21岁了，已经到了可以自己做主的年龄了。
Learn to creep before you leap.
循序渐进。
Is that all?
就是这些吗？