2 sentences for 轮回 (lún​huí — cycle)

1. 寒暑交迭，四季轮回。

   hán​shǔ jiāo dié, sì jì lún​huí.

   Winter and summer alternate, and the four seasons cycle through.

   Source: Dong Chinese Dictionary

2. 春夏秋冬的轮回是不可抗拒的自然规律。

   chūn xià qiū dōng de lún​huí shì bù kě kàng​jù de zì​rán guī​lǜ.

   The cycle of the four seasons is an irresistible law of nature.

   Source: Dong Chinese Dictionary