to start from square one meaning in English

意思是上次没有成功

He has to start from square one because his computer destroyed crashe his homework
由于电脑搞坏了他的作业
He has to start from square one because his computer destroyed （ crashed ） his homework
由于电脑搞坏了他的作业，他必须从头做起。
The search committee for the new college president will have to start from square one
选拔新校长委员会上次没有成功，现在又要从头做起。