在学校期间我努力学习专业知的翻译：While in school I studied hard expertise 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

I study hard at school during the professional knowledge

While in school I studied hard expertise

In school period I study the specialized knowledge diligently

My effort to learn at school expertise

While in school I studied hard expertise