Semicarbazide
氨基脲
🗣️ 情景例句
Typing is easy once you get the hang of it.
一旦你掌握诀窍，打字就很简单。
Take care of yourself and don't forget to keep in touch.
多多保重。别忘了保持联系。
For once, Harry had to admit defeat.
哈里只好认输。