of great moment meaning in Chinese

关系重大的

Historicism claims that nothing is of greater moment than the emergence of a really new period .
历史决定论声称没有什么事比出现真正的新时期更为重要。
Custom has not commonly been regarded as a subject of great moment
风俗一般未被认为是什么重要的课题。
So it is of great moment for us to discuss currency substitution in china
因此,研究货币替代对于中国来说,意义重大