cobble-stone sign鹅卵石征
cobble-stone diameter石子粒径
cobble-stone subsoil砂卵石地基
cobble-stone foundation soil砂卵石地基
cobble-stone subsoil reactions砂卵石地基反力
Machine-made Cobble Stone机
N-COUNT（可数名词） Cobblestones are stones with a rounded upper surface which used to be used for making streets. (铺设街道用的) 圆形鹅卵石
...the narrow, cobblestone streets of the Left Bank.
…左岸狭窄的鹅卵石街道。