备战2012年公共英语PETS4写作精选短语4
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back to square one
本文标题：备战2012年公共英语PETS4写作精选短语4 - 全国英语等级考试_PETS作文_公共英语等级考试写作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.
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