It takes great diligence and prolonged effort.

它需要刻苦和长期努力。

youdao

Learning English is by no means easy. It takes great diligence and prolonged effort.

学习英语绝非易事。它需要刻苦和长期努力。

youdao

A prolonged effort to build a precise requirements understanding or a detailed plan only delays a more thorough understanding of the architecturally significant issues.

延长建立一个精确的需求理解或详细的计划的时间实际上耽误了对架构上更重要的问题的理解。

youdao

At school or college the maximum length of a half-term is seven weeks, so it's also quite a prolonged effort.

BBC: A term older and wiser?

Neither organised their industrial war effort soon enough or comprehensively enough to cope with a prolonged war of attrition.

ECONOMIST: 20th-century history