To master a foreign language one must work hard at it.

问题描述:

To master a foreign language one must work hard at it.
那位大虾帮忙分析一下句子成分及翻译一下句意,先谢过了?

要想掌握一门外语必须努力学习.To master a foreign language是目的状语,one泛指人,work hard at 做谓语,