2 sentences

1. 这种物质的化学属性非常稳定。

   zhè zhǒng wù​zhì de huà​xué shǔ​xìng fēi​cháng wěn​dìng.

   The chemical properties of this substance are very stable.

   Source: Dong Chinese Dictionary

2. 在物理学中，质量是物体的基本属性。

   zài wù​lǐ​xué zhōng, zhì​liàng shì wù​tǐ de jī​běn shǔ​xìng.

   In physics, mass is a fundamental property of an object.

   Source: Dong Chinese Dictionary