广泛

extensive; broad; wide-ranging; widespread; far-reaching; widely; extensively; broadly; spread; in a big way

群众

the masses; the people; the crowd; general public; the multitude; the multitudes; mass

基础

foundation; base; basis; foot; root; element; essential; cornerstone; stuff; ground; groundwork; infrastructure; fundamental; rudiments; backbone; baseline; substructure; footing; underpinning; handmaiden; basic; basal; core; elementary; underlying; rudimentary; elemental; fundamentally