Nitrourea
硝基脲
🗣️ 情景例句
Well, it won't be easy.
嗯， 不很容易。
Her job is beginning to get her down.
她开始对工作感到厌倦了。
The inner workings of our own brains we feel to be uniquely worthy of investigation,
我们觉得，只有我们大脑内部的活动情况才值得研究，