Nad
[化] 烟酰胺腺嘌呤二核苷酸; 辅酶I
🗣️ 情景例句
Are the people friendly in China?
中国的人们友好吗？
A spot is most seen on the finest cloth.
最清洁的布上，污点特别显眼。
It was my first flight. I was nervous when the plane took off.
我第一次坐飞机，起飞时我有点紧张。