1. She spoke idiomatically, effortlessly integrating colloquial expressions into her speech.
她讲话很地道，毫不费力地将口语表达融入她的演讲中。

2. Learning a new language not only involves grammar and vocabulary, but also understanding how to use language idiomatically.
学习一门新语言不仅涉及语法和词汇，还要理解如何以地道的方式使用语言。