学而优则仕的英文：
[Literal Meaning]
study/aux./excellent/aux./to be official
He who excels in study can follow an official career (a Confucian slogan for education).

[解释]
因为学习成绩优秀被提拔当官。

[Explanation]
a good scholar can become an official

[例子]
学而优则仕，很多学习历史和哲学的毕业生都考了公务员去政府工作。

[Example]
He who excels in study can follow an official career. Many graduates majored in history and philosophy took the tests for public servants and worked for the governments.