相关单词近义词 infrastructure 基础, groundwork 基础, base 底部, foundation 根基, organization 机构, structure 结构, setup 装备, arrangement 布置, frame 骨架, preparation 准备, seat 座位, foot 脚, understructure 基础, fundament 基础临近词sub, sublock相似词substitute teacher, substitution, substrate, substratum, subsume, subtalar, subtenant, subtend, 返回 substructure