形容詞 unconcerned:

1. lacking in interest or care or feeling
2. easy in mind; not worried
3. not occupied or engaged with

1. He seems unconcerned, but nothing escapes his attention.
   別看他大大咧咧的，什么事他都很在心。
2. Seeming to be coolly unconcerned or indifferent.
   漠不關心的，冷淡的看上去漠不關心的或冷淡的
3. Most tourists were unconcerned at the poor weather.
   那些游客大多沒把壞天氣放在心上。
4. I am unconcerned with questions of religion or morality.
   我對宗教問題和道德問題不感興趣。