每个事物都有正面和反面。

měi gè shìwù dōu yǒu zhèngmiàn hé fǎnmiàn.

Every object has both positive and negative aspects.

这个政策的反面效果很明显。

zhège zhèngcè de fǎnmiàn xiàoguǒ hěn míngxiǎn.

The negative effects of this policy are very apparent.

请把纸翻到反面继续写。

Qǐng bǎ zhǐ fān dào fǎnmiàn jìxù xiě.

Please turn the paper to the other side and continue writing.