Immunisation
n. 免疫(immunization)
🗣️ 情景例句
There's much more to be done.
要做的事太多了。
If the old dog barks,he gives counsel.
老狗叫，是忠告。
As his flat is in a large town, he has no garden of his own.
他住在大城市里的一所公寓里，没有自己的花园。