Square one
01
起点, 第一格
the point or situation from which one starts to do something
Idiom
例子
After the project failed, they had to go back to square one and rethink their strategy.
项目失败后，他们不得不回到起点并重新思考他们的策略。
It feels like I 'm at square one again after losing all my data.
感觉在丢失所有数据后，我又回到了起点。
