2 sentences

1. 辛亥革命后，中国建立了共和政体。

   xīn​hài gé​mìng hòu, Zhōng​guó jiàn​lì le gòng​hé zhèng​tǐ.

   After the Xinhai Revolution, China established a republican system of government.

   Source: Dong Chinese Dictionary

2. 这个国家的政体在几十年前转变成为了共和国。

   zhè gè guó​jiā de zhèng​tǐ zài jǐ​shí nián qián zhuǎn​biàn chéng​wéi le gòng​hé​guó.

   The country's system of government transformed into a republic decades ago.

   Source: Dong Chinese Dictionary