2 sentences

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. 寒暑交互，岁律更新。

   hán​shǔ jiāo​hù, suì​lǜ gēng​xīn.

   Seasons alternate, and the rhythm of the year is renewed.

   Source: Dong Chinese Dictionary