2 sentences

1. 经常运动有助于提高身体的代谢水平。

   jīng​cháng yùn​dòng yǒu​zhù​yú tí​gāo shēn​tǐ de dài​xiè shuǐ​píng.

   Regular exercise helps improve the body's metabolism.

   Source: Dong Chinese Dictionary

2. 自然界的发展是一个不断代谢、更替的过程。

   zì​rán​jiè de fā​zhǎn shì yī gè bù​duàn dài​xiè, gēng​tì de guò​chéng.

   The development of nature is a process of constant metabolism and replacement.

   Source: Dong Chinese Dictionary