无关紧要的

This is a matter of no account.

这是一件紧要事。

He often dissipated his energies in trivial matters.

他常紧要小事上浪费精力。

That’s something extrinsic to the subject.

那是对本题紧要。

It is a mere trifle.

那只是紧要事而已。

By becoming involved with tangential issues, it hopes to hide the real question and keep it out of mind.The ego's characteristic busyness with nonessentials is for precisely that purpose.

它之所以老紧要题上搅和，乃是希望借此避开真题，将它驱逐于心灵之外。