Ordinalism
序数论
🗣️ 情景例句
I'm thrilled for you, Grandpa.
我真为你兴奋， 爷爷。
What kind of talk is that?
你说这什么话？
They all went up some narrow steps into a large room.
他们全都登上这些狭窄的台阶，接着进入一个大房间。