3 sentences

1. 成吉思汗是历史上著名的可汗。

   Chéng​jí​sī​hán shì lì​shǐ shàng zhù​míng de kè​hán.

   Genghis Khan was a famous khan in history.

   Source: Dong Chinese Dictionary

2. 成吉思汗被推举为蒙古帝国的大汗。

   Chéng​jí​sī​hán bèi tuī​jǔ wéi Měng​gǔ dì​guó de dà​hán.

   Genghis Khan was elected as the Great Khan of the Mongol Empire.

   Source: Dong Chinese Dictionary

3. 铁木真后来统一了蒙古各部，成为了成吉思汗。

   Tiě​mù​zhēn hòu​lái tǒng​yī le Měng​gǔ gè bù, chéng​wéi le Chéng​jí​sī​hán.

   Temujin later unified the Mongolian tribes and became Genghis Khan.

   Source: Dong Chinese Dictionary