Phosphonitrogen
磷氮肥
🗣️ 情景例句
Don't worry about being late. It's fine.
别为迟到担心了 没有关系。
I lack words, with which to express my thanks.
我无法以言语来表达我的感激之情。
It was an important part of Native American's existence.
野牛是美洲土著人赖以生活的重要部分。