He published a treatise that he had written earlier on grammar, inventing his own system for the understanding and the learning of the Latin language.

发表了一篇他之前写的关于语法的论文，在这篇论文中他创建了自己的一套理解和学习,拉丁文的体系。

耶鲁公开课 - 弥尔顿课程节选

Can you give us some advice on learning a second language?

你能给我们一些关于学习第二语言的建议吗？

学第二外语的时候 - SpeakingMax英语口语达人