Dinitration
二硝化作用
🗣️ 情景例句
I'm afraid I'll be tied up tomorrow at ten.
恐怕明天上午10点我很忙。
Don't forget to help him.
不要忘记帮助他。
Li Bai is one of the greatest poets that have ever lived in China.
李白是中国有史以来最伟大的诗人之一。