誓不罢休

wǒ men bù dá mù dì shì bù bà xiū

我们不达目的，誓不罢休。

We'll never stop until we reach our goal.

tā hěn qiáng yìng bù dá mù dì shì bù bà xiū

她很强硬，不达目的，誓不罢休。

She is tough, unwilling to take no for an answer.