Parnanthracene
[化] 双蒽; 仲蒽; 聚二蒽
🗣️ 情景例句
OK.
好。
In college I majored in physics, What was you major?
大学时我主修物理，你主修什么呢？
She was choosing a book. He told her about the accident.
她正在选书。他将发生的情况告诉了她。