1 sentence for 擦 (cā — eraser)

1. 每个人都会犯错，这就是他们在铅笔上安上橡皮擦的原因。

   měi​ge​rén dōu​huì fàn cuò, zhè jiù​shì tā​men zài qiān​bǐ shang ān shang xiàng​pí​cā de yuán​yīn.

   Everybody makes mistakes, that's why they put erasers on pencils.

   Source: CCMatrix