grass rootɡrɑ:sru:t短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 基层;草根,草根阶层 The major reasons: economic development and people structure in the countryside, soft and hardware of grass root earthquake authorities limit the improvement of earthquake mitigation awareness. 究其原因:农村地区经济发展水平、农村社会人员结构和基层地震部门软硬件条件制约了防震减灾意识的提升。 fzxbbjb