Parnanthracene
[化] 双蒽; 仲蒽; 聚二蒽
🗣️ 情景例句
But there's the old community center on Elm Street.
但是在Elm街有一个旧的社区中心。
When do you want to leave?
你想什么时候离开？
It's a car.
是一辆车。