我的腰持续疼了一个月了。

Wǒ de yāo chíxù téngle yí gè yuè le.

My lower back has been hurting for a month now.

雨已经持续了两天了。

Yǔ yǐjīng chíxùle liǎng tiānle.

It has been raining for two days.

我们要持续努力才能取得进步。

Wǒmen yào chíxù nǔlì cáinéng qǔdé jìnbù.

We need to continue our efforts in order to make progress.