lì shǐ / kè / shàng / lǎo shī / xiáng xì / jiǎng jiě / le / Wǔ bà / zhēng bà / de / gù shì历史课上,老师详细讲解了五霸争霸的故事。In history class, the teacher explained in detail the stories of the Five Hegemons contending for supremacy.