lì / shǐ / kè / shàng / lǎo / shī / xiáng / xì / jiǎng / jiě / le / Mèng / liáng / gù / Zhàn / yì / de / jīng / guò

历史课上，老师详细讲解了孟良崮战役的经过。

In history class, the teacher explained in detail how the Battle of Menglianggu unfolded.