tā / zài / kè / táng / shàng / jiè / shào / le / wǔ / shì / dào / de / lì / shǐ / hé / zhǔ / yào / guān / niàn

他在课堂上介绍了武士道的历史和主要观念。

He introduced the history and main ideas of bushidō in class.