Nitrourethane
[化] 硝氨基甲酸乙酯
🗣️ 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。
One man may steal a horse while another may not look over a hedge.
只许州官放火，不许百姓点灯。
Yes.
是的。