She shows great diligence in her schoolwork.

她上学非常用功。

《牛津词典》

The police are pursuing their inquiries with great diligence.

警察正以不懈的努力进行着调查。

《柯林斯英汉双解大词典》

It takes great diligence and prolonged effort.

它需要刻苦和长期努力。

youdao

Primedia apparently didn't do such a great job of due diligence on Ashton.

FORBES: Magazine Article

This type of protection requires constant diligence, and a great deal of thought and planning in the design of information systems.

FORBES: Can You Keep a Secret? Protecting Your Business's Most Valuable Asset

Anyone who has studied the financial markets with any diligence will know that great bull markets are born from a landscape of steadfast pessimism and distrust of anything having to do with the Wall Street.

FORBES: University Of Michigan Survey Makes Dow 20,000 Look Easy