Nitronium
硝离子
🗣️ 情景例句
I know.
我知道。
Suppose you couldn't go on the trip.How would you feel?
假定你不能继续你的旅行，你将感觉如何？
It is the one world in the Solar System that is most like the Earth.
火星是太阳系里与地球最接近的一颗行星。