Indigogen
[医] 靛原, 靛白
🗣️ 情景例句
Keep your nose to the grindstone; you'll succeed.
埋头苦干，总有成功的一天。
How thick is the ice here?
这儿的冰有多厚？
The things on show were all used a hundred years ago.
展出的都是100年前使用的东西。