Quaternarization
[化] 季铵化作用; 门秀金反应
🗣️ 情景例句
but now what?
但下一步怎么办？
What's your nationality?Are you American?
你的国籍是什么?你是美国人吗？
The film itself wasn't good but I liked the music.
电影本身不怎么样，但音乐还不错。