Oughtness
有义务的状态
🗣️ 情景例句
As simple as that.
就这么简单。
He tells me is a city boy, and this is his first time to live in a camp like this.
他说他是一个都市男孩，这是他第一次过这种野营生活。
What is the name of the machine?
机器的名字叫什么呢？