"努力工作"的英文翻译是 "work hard". "努力"的英文为 "hard"，"工作"的英文为 "work"。这两个词都来源于拉丁语，"hard" 源于拉丁语的 "durus"，意为 "坚硬"，"work" 源于拉丁语的 "opera"，意为 "工作"。

一些英文例句：

I always work hard to achieve my goals.

She is known for her hard work and dedication.

He believes that success comes from hard work.