lì / shǐ / kè / shàng / lǎo / shī / jiè / shào / le / Zhōu / Chéng / wáng / zài / wèi / shí / qī / de / Xī / Zhōu

历史课上，老师介绍了周成王在位时期的西周。

In history class, the teacher introduced the Western Zhou during the reign of King Cheng of Zhou.