a level substratum水平的底层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。...its deep substratum of chalk...深厚的白垩地层The story has a substratum of trut...
His re-creation 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。The best nutrition supply was basic substratum mixed with rapeseed cake liquid.营养供给以基本基质加菜籽饼水液为佳....
10,000 deaths a year from chronic lung disease are attributable to smoking.吸烟导致每年有1万人死于慢性肺病。Many of these poets appeared in print only long after their deaths.这些诗人中有很多都是在去世很久以后作品才得以发表的。Doctors still aren't sure what...