Phenophenanthrazine
[化] 苯并菲嗪
🗣️ 情景例句
I'm sorry you have to leave so soon.
很遗憾你不能多呆会儿。
Finished labours are pleasant.
大功告成，好不高兴。
There is a broken small old gray stone bridge over the river.
河上有一座破烂不堪的、古老的、灰色的小石桥。