3 sentences

1. 这种习俗肇始于清朝初期。

   zhè zhǒng xí​sú zhào shǐ yú Qīng​cháo chū​qī.

   This custom originated in the early Qing Dynasty.

   Source: Dong Chinese Dictionary

2. 专家正在努力寻找文明的肇端。

   zhuān​jiā zhèng​zài nǔ​lì xún​zhǎo wén​míng de zhào duān.

   Experts are working hard to find the origins of civilization.

   Source: Dong Chinese Dictionary

3. 警方正在全力追捕交通肇事逃逸者。

   jǐng​fāng zhèng​zài quán​lì zhuī​bǔ jiāo​tōng zhào shì táo​yì zhě.

   The police are making every effort to track down the hit-and-run driver.

   Source: Dong Chinese Dictionary