Variolization
[医] 人痘接种, 天花接种, 引痘
🗣️ 情景例句
I did.
看到了。
This problem is hard to solve.
要解决这个问题不简单。
The old farmhouse the family lived in was to be replaced by new $500,000 home.
这家人住的旧家舍将由一座价值50万美元的新住宅所取代。