constancy
n. 坚定不移；恒久不变
例句
He admired her courage and constancy.
他钦佩她的勇气和忠贞。
《牛津词典》
We live in a world without constancy.
我们生活在一个不断变化的世界。
《柯林斯英汉双解大词典》
Mandelbrot, who did the experiment with stock exchanges prices, for example, noted that although the outcomes were variable, there were, in fact, certain constancy.
例如，做过股票交易所价格实验的曼德尔布洛特指出，尽管结果是可变的，但实际上存在一定的一致性。
