Thiophanthrene
萘并[2, 3-b]噻吩
🗣️ 情景例句
What's the nature of the problem?
是什么样的问题？
The doctor advised me to drink plenty of water.
医生劝我要多喝水。
I stopped to let the car cool off and to study the map.
我停下车，让汽车发动机冷却一下，同时查看一下地图。