blue pencil
noun [ S ] uk/ˌbluː ˈpen.səl/ us/ˌbluː ˈpen.səl/
修改;删除;编辑
If a person goes over a piece of writing with a blue pencil, they remove or change some of the words to improve it or make it acceptable.
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。