What she said is a matter of complete indifference to me.

她的话对于我来说完全无关紧要。

《牛津词典》

But when you feign complete indifference, it will fawn upon you, lean close to you and live with you.

当你假装不关心它时，它又来讨好你、依偎着你、不离开你。

youdao

I can still remember your complete indifference as to whether the sun moved round the earth or the earth round the sun.

我还记得在谈到究竟是太阳围着地球转还是地球围太阳转这个问题的时候，你的那种漠不关心的态度。

youdao

While the rest of the world reacted with stunned disbelief -- legend has it several British newspapers didn't report the score at first, fearing that it had been mistyped and England had really won 10-0 -- back home Team USA's exploits had been met with almost complete indifference.

CNN: When U.S. postmen and miners humbled England