鉴于大家对英语英语考证PETS写作十分关注，我们编辑小组在此为大家搜集整理了“PETS4写作精选短语back to square one”一文，供大家参考！
PETS4写作精选短语back to square one
back to square one
An expression used to mean that it is necessary to stop whatever one has done on a new project and to start again completely.
EXAMPLE:
When our experimental design for a new solar automobile failed totally on the first day of testing, our engineering department knew it was back to square one.