Lìshǐ / kè / shàng， / lǎoshī / jièshào / le / zhěngfēng / yùndòng / de / bèijǐng / hé / yǐngxiǎng。

历史课上，老师介绍了整风运动的背景和影响。

In history class, the teacher introduced the background and impact of the rectification campaign.