Dinitration
二硝化作用
🗣️ 情景例句
Let's drill them in English pronunciation.
我们来给他们做英语发音练习。
He has lived here for a year.
他在这里住了一年了。[表示持续到现在的行为]
Education in the wilderness is not a matter of monetary means.
荒凉地区的教育不是钱的问题，