There are some theoretical arguments about possible variations of fundamental constants with cosmic time. We review the fact that all conversion factors depend on these quantities and consider how their variations may affect transformations of units. We deal with the relevance of the issue to the cosmological constant problem.

中文翻译：

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关于单位变换的非平凡性

关于基本常数随宇宙时间的可能变化存在一些理论争论。我们回顾了所有转换因子都取决于这些数量的事实，并考虑它们的变化如何影响单位转换。我们处理这个问题与宇宙常数问题的相关性。