Dinaphthylmethane
二萘甲烷
🗣️ 情景例句
What books are required for this class?
这课需要什么样的书？
Fire, water, and money are good servants, but bad masters.
水火金钱是忠仆，使用不当是祸首。
Why didn't you tell me then?
为什么那时不告诉我呢？