His re-creation of the city is credible, with a substratum of fact to bolster the fiction.他对该城的再现是可信的，虚构之下有着史实作为支撑。Divers found this unique species of fish at the substratum of the sea.潜水夫在海的底层发现了这个独特的鱼种。His recreation of the city is credible, with a substratum of fact to bolster the fiction.他对该城历史的再现是可信的，虚构的小说情节隐念着一些事实作为支撑。