“墨守法规”较为贴切的英文表达可以是 “stick rigidly to regulations” 或者 “adhere inflexibly to rules and regulations” 。
“stick rigidly to” 意思是“严格遵守、墨守” ，“adhere inflexibly to” 同样表达“严格、不灵活地遵守” ，二者都体现出“墨守”那种较为刻板、不知变通地遵循规则的状态；“regulations”“rules and regulations” 指“法规、规章制度” 。