Niacin
n. 烟碱酸\\n[化] 烟酸
📖 牛津释义
niacin
n[U]
vitamin found in meat, yeast and some cereals 烟碱酸（肉类、 酵母和某些谷物中的维生素）.
🗣️ 情景例句
Maybe we could make it a surprise.
也许我们可以让它变成一场惊喜。
Please come here.
请来这里。
It is because his feet move on, but his head stays still.
这是因为他的脚动了，而他的头保持着静止。