Vaccinist
[医] 种痘员, 接种员
🗣️ 情景例句
It's me, Grandpa.
是我， 爷爷。
Is it too far to walk?
走着去很远吗？
As a reasonable guess, they might, on an average, be 100 light years away.
据合理推算，外星人离我们平均距离也有100光年之远