Parnanthracene
[化] 双蒽; 仲蒽; 聚二蒽
🗣️ 情景例句
My boss does everything by the book.
我们老板一切照章办事。
Grain by grain,and the hen fills her belly.
一颗接一颗，母鸡填饱肚。
For most of the earth's history they have been the only form of life on our planet.
在地球上发展的大部分进程中，细菌是地球上唯一的生命形式。