3 sentences

1. 焚书坑儒是秦朝著名的历史事件。

   fén​shū kēng rú shì Qín​cháo zhù​míng de lì​shǐ shì​jiàn.

   The burning of books and burying of scholars was a famous historical event in the Qin Dynasty.

   Source: Dong Chinese Dictionary

2. 这一历史事件发生在公元五世纪。

   zhè yī lì​shǐ shì​jiàn fā​shēng zài gōng​yuán wǔ shì​jì.

   This historical event took place in the fifth century AD.

   Source: Dong Chinese Dictionary

3. 这些重要的历史事件都已载于史。

   zhè​xiē zhòng​yào de lì​shǐ shì​jiàn dōu yǐ zǎi yú shǐ.

   These important historical events have been recorded in the annals of history.

   Source: Dong Chinese Dictionary