I lost count and had to start again.

我数着数着忘了，不得不又从头开始数。

《牛津词典》

By then it was late, and I was tired, and next day I'd forgotten it all and had to start all over again.

到那时已经很迟了，我疲倦已极，第二天我竟全给忘了，只好重新再读。

youdao

I had never made friends very easily, and now I would have to start all over again.

交朋友对我来说从来都不容易，而现在我必须要从头来过。

youdao

And if I had to start my career again, I would do the same things.

BBC: How Bellion bounced back

Treblinka became real, the shift from myth to reality took place in a blinding flash, the encounter between a name and a place wiped out everything I had learned, forced me to start again from scratch.

NEWYORKER: Witness

"I had no money to start traveling again, and Kazakhstan came at a time when they were supporting me and still saw a lot of potential in me, so I took the chance, " Karatantcheva said.

WSJ: How to Build a Tennis Empire