Niconacid
烟酸
🗣️ 情景例句
Camping out is such great fun.
露营是件非常好玩的事。
He has graciously consented to speak to us on that subject tonight.
他同意今晚他将就这一专题演讲。
Two men took the parcel off the plane and carried it into the Customs House.
有两个人把包裹拿下飞机，进了海关。