Phosphonitrogen
磷氮肥
🗣️ 情景例句
Oh, I'm sorry Susan isn't here.
啊 可惜Susan不在。
Could you do me a favor?
能请你帮个忙吗？
This may be illustrated by comparing the position of a nation with that of a private business enterprise.
把国家的状况同私人企业的状况加以比较，就可以看清这个问题。