Variolization
[医] 人痘接种, 天花接种, 引痘
🗣️ 情景例句
There are several tours of the Grand Canyon.
到大峡谷有好几个旅游团。
We always open Christmas present on Christmas morning.
我们通常在圣诞节早晨打开圣诞礼物。
The door is opened by his son, Gary.
开门的是他的儿子加里。