3 sentences

1. 恒言道：“失败乃成功之母。”

   héng yán dào:“ shī​bài nǎi chéng​gōng zhī mǔ.”

   As the saying goes, "Failure is the mother of success."

   Source: Dong Chinese Dictionary

2. 恒卦象征着持久与稳定。

   héng guà xiàng​zhēng zhe chí​jiǔ yǔ wěn​dìng.

   The Heng hexagram symbolizes persistence and stability.

   Source: Dong Chinese Dictionary

3. 恒先生在我们公司担任技术顾问多年。

   Héng xiān​sheng zài wǒ​men gōng​sī dān​rèn jì​shù gù​wèn duō nián.

   Mr. Heng has served as a technical consultant in our company for many years.

   Source: Dong Chinese Dictionary