4 sentences

1. 遵法守纪是每个公民的义务。

   zūn​fǎ shǒu jì shì měi gè gōng​mín de yì​wù.

   It is the duty of every citizen to abide by the law and observe discipline.

   Source: Dong Chinese Dictionary

2. 纪先生是这位著名画家的父亲。

   Jǐ xiān​sheng shì zhè wèi zhù​míng huà​jiā de fù​qīn.

   Mr. Ji is the father of this famous painter.

   Source: Dong Chinese Dictionary

3. 二十一世纪是信息技术的时代。

   èr​shí​yī shì jì shì xìn​xī jì​shù de shí​dài.

   The twenty-first century is the era of information technology.

   Source: Dong Chinese Dictionary

4. 这部史书详尽地纪述了那个朝代的兴衰。

   zhè bù shǐ​shū xiáng​jìn de jì shù le nà gè cháo​dài de xīng​shuāi.

   This history book records the rise and fall of that dynasty in detail.

   Source: Dong Chinese Dictionary