Indocarbon
靛炭(一种硫化染料)
🗣️ 情景例句
Do you want a first class, business class or economy seat?
你想要头等舱、商务舱还是经济舱？
Maybe some other time.
也许下一次吧。
I regretted saying it almost at once.
但马上又后悔说了这话。