Naphthindene
萘并环戊烯
🗣️ 情景例句
and tell him you're coming?
告诉他你要去吗？
I get out of bed about 7 o'clock every morning.
我大约每天早上7点钟起床。
There were twenty cars in the race.
参加比赛的有20辆汽车。