Indocarbon
靛炭(一种硫化染料)
🗣️ 情景例句
Oh, Miss Li. This is Tom. I didn't recognize your voice.
噢，李小姐。我是汤姆。我没听出你的声音。
Do you like sliding?
你喜欢溜滑梯？
Education, with its cycles of instruction so carefully worked out,
教育，以其教学周期如此精心地安排，