zài / huà xué / kè shàng / lǎo shī / yǎn shì / le / liǎng zhǒng / yán / zhī jiān / de / fù fēn jiě / fǎn yìng

在化学课上，老师演示了两种盐之间的复分解反应。

In chemistry class, the teacher demonstrated a metathesis reaction between two salts.