单词	datum identifier
释义	datum identifier 基准标识
随便看	roughness meter roughness of an engine roughness of channel roughness of crown roughness of cut face roughness of disturbing fuzzy sets roughness of engine roughness of hole side roughness of knowledge roughness of particles roughness of river beds Roughness of road surface roughness of rock surface roughness of skin Roughness of skin roughness of surface Roughness of the background Roughness of the skin can be caused by bad diet roughness of the substrate roughness of the surface roughness of voice roughness on inner surface type roughness on tyre cavity roughness parameter roughness parameter of river network