Never mind such trifles.

不必介意这些小事。

Don't wrangle with others over trifles.

别为一些琐事与别人争吵。

Why bother your head about such trifles?

你何苦在这些小事上伤脑筋？

I'll never make a fuss about the trifles with him.

我不会在这件小事上与他计较。

From these trifles you can gather what kind of person he is.

从这些小事上，你可以想见他的为人。