Dinitration
二硝化作用
🗣️ 情景例句
Here it is, with it.
在这儿，附有保证书。
I can't recall how long it's been.
我不能记起多长时间了。
'I left the money in my room,' I said, 'and it's not there now.
“我把钱放在房间里，”我说，“可现在没有了。