Phenophenanthrazine
[化] 苯并菲嗪
🗣️ 情景例句
What subject did you major in university?
你在大学主修的科目是什么？
Light troubles speak; great troubles are silent.
小困难，大声叫嚷；大困难，闷生不响。
Yes. He wanted you to ring him.
留了。他要你给他打电话。