Ectophylaxination
被动免疫, 外来免疫
🗣️ 情景例句
Catching a fish is a lot more complicated than just throwing a worm in the water.
钓鱼可不是把鱼饵抛进水里那么简单。
Finally,I asked him how old he was.
最后,我问他他多大。
'I'll write a letter soon.
“我很快会写信的。