Correct or improve the translation of the following English sentences.原文：Languages are difficult to learn and no less difficult to teach. 译文：语言，学起来很困难，教起来则比较容易。

Correct or improve the translation of the following English sentences.原文：Languages are difficult to learn and no less difficult to teach. 译文：语言，学起来很困难，教起来则比较容易。

语言既难学又难教。