2 sentences

1. 深秋时节，草木凋零。

   shēn​qiū shí​jié, cǎo​mù diāo líng.

   In late autumn, the vegetation withers.

   Source: Dong Chinese Dictionary

2. 秋风吹过，树上的黄叶纷纷凋落。

   qiū​fēng chuī guò, shù​shàng de huáng​yè fēn​fēn diāo luò.

   As the autumn wind blows, yellow leaves fall from the trees one after another.

   Source: Dong Chinese Dictionary