Indifference is also the preferred option among those who are socially lazy.
对于怠于社交的人来说，保持冷漠也不失为首选。
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。
She had developed a shell of indifference.
她养成一副冷漠的外表。
He adopted an air of indifference.
他摆出一副满不在乎的样子。