Monoprotic
一元的
🗣️ 情景例句
I've got to go. Tomorrow is Monday,
我得走了。明天是星期一。
Is that Mr.Shen?
沈先生吗？
It was called Saving the earth and it was all about the damage that is being caused to the world.
会议叫“拯救地球”，所以全是有关地球遭受破坏的事情。