Mesition
3-二甲氨(基)甲酰氧基-1-甲基吡啶
🗣️ 情景例句
Never pump gas with the engine running.
发动机在运转时，别加油。
Have you had breakfast already?
你已经吃了早餐吗？
Yes, I have.I think that.I've hurt my back.
是啊，摔伤了。我想我把背摔坏了。