Thiophanthrene
萘并[2, 3-b]噻吩
🗣️ 情景例句
What can I do for you?
我能帮你什么忙？
No matter what happens, don't look excited.
不管什么事情发生，你总不要显得激动。
Some of the things were hundreds of years old.
展出的一些东西已有数百年的历史了。