Fenchone
葑酮, 1, 3, 3-三甲基-1, 4-桥亚甲基-2-环己酮
🗣️ 情景例句
If no one comes to claim Gemma,
如果没有人来认领Gemma，
Whom are you calling?
你要找谁？
The children were leaving school on Tuesday when they saw a truck.
星期二，孩子们正放学回家，这时，他们看见一辆卡车。