Preimmunization
[医] 幼儿期免疫接种
🗣️ 情景例句
What time does the library close?
图书馆什么时候闭馆？
Early mistakes are the seeds of future trouble.
早期的错误可以酿成日后的麻烦。
'I was in my office as usual,' answered the Ambassador.
“我和往常一样，在办公室里，”大使回答说。