lì shǐ / kè shàng / lǎo shī / jiǎng jiě / le / bō ěr bù tè / zài / jiǎn pǔ zhài / zhí zhèng / shí qī / de / zhèng cè

历史课上老师讲解了波尔布特在柬埔寨执政时期的政策。

In history class, the teacher explained the policies of Pol Pot during his rule in Cambodia.