Lǎoshī / zài / kè / shàng / jièshào / le / Chūncán / de / pāishè / bèijǐng / hé / yìshù / fēnggé

老师在课上介绍了《春蚕》的拍摄背景和艺术风格。

The teacher introduced the filming background and artistic style of Spring Silkworms in class.