Preimmunization
[医] 幼儿期免疫接种
🗣️ 情景例句
Keep a small English dictionary with you at all time.
随身携带一本小英文字典。
A hen is on her eggs.
母鸡蹲在它的蛋上。
The children are no longer young, and they know who Father Christmas really is.
孩子们不小了，他们知道真正的“圣诞老人”是谁。