1 sentence

1. 我正在读布坎南总统的传记，了解那段历史。

   wǒ zhèng​zài dú Bù​kǎn​nán zǒng​tǒng de zhuàn​jì, liǎo​jiě nà duàn lì​shǐ.

   I am reading a biography of President Buchanan to learn about that period of history.

   Source: Dong Chinese Dictionary