often的同义词?答:20. 急剧的:Dramatically,drastically,sharply,hugely,enormously,steeply,substantially,considerably,significantly,markedly,surprisingly,strikingly,radically,remarkably,vastly,noticeably21. 平稳地:Steadily,smoothly,slightly,slowly,marginally,gradually,moderately,mildly22. 宣称:Allege, assert, declare, claim23. 发生:Happ...