Nigrometer
黑度计
🗣️ 情景例句
What are some places of interest to visit there?
那儿有什么有趣的地方可以参观的吗？
They don't know when the wedding will be.
他们不知道婚礼将是什么时候。
People should be ready to go to prison for their beliefs, but they should never take up arms to fight.
为了信仰，人民应该准备去蹲监狱，但决不应该拿起武器去斗争。