constancy

柯林斯词典

1. N-UNCOUNT Constancy is the quality of staying the same even though other things change. 恒久性
We live in a world without constancy. 我们生活在一个不断变化的世界。
2. N-UNCOUNT Constancy is the quality of being faithful and loyal to a particular person or belief. 坚贞[表赞许]
...those who have proved their constancy in love. ...那些已经证明自己爱情坚贞的人们。