Naphthophenanthrene
二苯并蒽
🗣️ 情景例句
Wonderful. I'll call you,
那太好了。我打电话给你。
The joy of the heart makes the face merry.
喜形于色。
Although we can't see these atoms, they really do exist.
虽然我们看不见原子，但它们的确存在。