Examples

他们看不起我们，认为无足轻重。

They looked down upon us as of little importance.

无足轻重。

He is just an insect in the company and deserves no mention.

他只是个无足轻重的人，不值一提。

He is a nothing, a nobody, and we shouldn't worry about what he says.

他是个无关紧要无足轻重的人，我们不要因为他的话感到担心。

By Hollywood standards, the Royal scandals were small potatoes.

按好莱坞标准，皇室丑闻是无足轻重的。

Whether you choose to do it or not is a matter that is quite immaterial (or indifferent).

无论你决定做还是决定不做都无足轻重了（无关紧要了）。