Thiophanthrene
萘并[2, 3-b]噻吩
🗣️ 情景例句
We have no collateral.
我们没有担保物。
I'm not really sure about that. Mr. Jiang should know the answer to that.
关于那事我不敢确定，蒋先生应该知道答案。
Good.we can't extend the deadline.
那好，我们可不能延期的。