Indocarbon
靛炭(一种硫化染料)
🗣️ 情景例句
See you in front of the museum at five o'clock.
五点钟博物馆前再见。
Be slow to promise and quick to perform.
不轻诺，诺必果。
What colour are you going to paint it?
你打算把它漆成什么颜色？