Niketharol
N, N-二乙基烟酰胺
🗣️ 情景例句
How do you spend your leisure time?
你是怎样打发业余时间的？
I was born anAmerican; I live an American; I shall die an American.
我生下来是美国人，活着是美国人，死时也是美国人。
I saw him playing football on the playground.
我看见他在操场上踢足球。