良好的血液循环对身体健康非常重要。

Liánghǎo de xuèyè xúnhuán duì shēntǐ jiànkāng fēicháng zhòngyào.

Good blood circulation is very important for your health.

地球上的水在不断循环。

Dìqiú shàng de shuǐ zài búduàn xúnhuán.

Water on the earth is constantly circulating.

这首歌一直在循环播放，我已经听腻了。

Zhè shǒu gē yìzhí zài xúnhuán bòfàng, wǒ yǐjīng tīng nì le.

This song has been playing on a loop; I'm already tired of it.