这幅画是纯粹的抽象艺术。

Zhè fú huà shì chúncuì de chōuxiàng yìshù.

This painting is purely abstract art.

这家餐厅提供纯粹的有机食物。

Zhè jiā cāntīng tígōng chúncuì de yǒujī shíwù.

This restaurant offers purely organic food.

我参加这个活动纯粹是出于兴趣。

Wǒ cānjiā zhè gè huódòng chúncuì shì chūyú xìngqù.

I took part in this activity purely out of interest.