momentous 雅思托福GREGMAT专八

I am deeply honoured to be invited to this momentous occasion.

能应邀出席如此要场合，我深感荣幸。

Its compositional ichthyofauna differs from its consecuting fiver systems,and has momentous significance on succession of fishes and ichthyofauna dividatur in watershed of North China.

在鱼类区系组成上，它与相邻水域有很大差异，在我国北方水域鱼类演替和区系划分上有要意义。