substructure下层结构: understructure底层: ground floor; first floor ba ...结构: structure; composition; cons ...底层结构;下层结构;地下建筑: substructure下层结构: infrastructure; subsurface structure; understructure下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:下层结构;底层结构,即可在微信中查询翻译