名词是constancy，n. 坚定不移恒久不变，副词是constantly，adv. 总是，经常地，不断地，复数constants，n. [数]常量，[数]常数物理常数（constant 的复数）
Surgical techniques are constantly being refined.外科手术技术正在不断得到完善。
Maybe this is consistent with a change in the constants， but this would be the very first， and it would just change our view of the laws of nature.
复数constants
同义词continual，continuous，uninterrupted，consistent，permanent，stable
