Methylnicotinamide
[化] 甲基煙酰胺
??? 情景例句
So, what were you two talking about?
你們倆剛才談什么了？
Excuse me? I didn't hear what you said.
對不起，我沒有聽清你說的話。
Do you think you'll be able to go to sleep right away?
你認為你馬上就能睡著嗎？