Fk
abbr. 外键（foreign key）
🗣️ 情景例句
Are you a resident of Shanghai?
你是上海市居民吗？
He was content that the thing had happened.
这事终于发生了，对此他是满意的。
I waited till he came near, then I asked him the way to our old village.
等他走近了，问他去老家的路。