I knew if I kept at it I should succeed.

我知道如果我坚持下去就会成功。

youdao

It was the best part of a day's work but I kept at it.

这是一天工作里最难的，但是我坚持下来了。

youdao

I knew if I kept at it, I'd eventually finish writing my book.

我知道如果我持续下去，最后一定可以写完这本书。

youdao

I kept saying to myself that when at last they found out about him, it will be like the sun falling out of the sky.

VOA: special.2010.03.27

"I kept saying to myself that when at last they find out about him, it will be like the sun falling out of the sky.

VOA: special.2009.01.03

At least I kept it clean.

FORBES: Me And My Fake Girlfriend

It dates back to 1565 when Queen Elizabeth I granted a fief for the island, on condition that it was kept free of pirates and occupied by at least 40 men who could carry arms.

BBC: Island of Sark 'is not for sale', says Seigneur

"Excuse me, your honor. may I remind the court that Mr. Shapiro kept the court waiting for 20 minutes showing up at 20 after nine when it was his witness on the stand and suffered no sanction, " said Clark.

CNN: Frayed nerves will remain after Simpson trial