Thioindigo
硫靛蓝
🗣️ 情景例句
Where do I register for classes?
我在哪儿登记我上的课？
We kept on discussing the problem for four hours.
我们持续讨论那个问题达四小时。
It will be found that the weight moves but slightly or not at all.
结果会发现，重物是动了，但动得很小，甚至没动。