Unboundedness
无界性
🗣️ 情景例句
Marilyn and Richard will be home from the hospital any minute,
Marilyn和Richard随时都会从医院回来，
You should wear a sweater, It's cold today.
你应该穿一件毛衣，因为今天很冷。
That's right. And the air today is nice and clean.
对。今天空气很清新。