He regards such matter with complete unconcern.

他对这不关。

Scott seemed unconcerned by his companion's problem.

斯科特对同伴的困难似乎不关。

He is callous about the safety of his workers.

他对他工人的安全不关。

Elaine didn't give a fig for Joe's comfort or his state of mind.

伊莱恩不关乔的痛痒和他的精神状态。

It is quite indifferent to me whether you go or stay.

对你的去留我不关。

I am indifferent to their arguments.

我对他们的争论不关。