“今天比昨天冷多了。”他漫不经心地说。

'It's much colder than yesterday,' he remarked casually.

《牛津词典》

"哦，"他漫不经心地说道，"我不急着回去。"

"Oh," he said carelessly. "I'm in no hurry to get back."

《柯林斯英汉双解大词典》

她看似漫不经心地处理了这件事。

She handled the matter with seeming indifference.

《牛津词典》

It's all similar in that it reminds us of the connection that we have, when we really are feeling fully present, and not mindless, and unaware of everything around us, and our place and our connection.

大同小异，都提醒我们,我们之间的联系，我们真切地感受到当下，而不是漫不经心，不觉周围事物，不知我们之所在和我们的联系。

普林斯顿公开课 - 人性课程节选

But still with some resemblance of nonchalance I asked, ?" "how different?"

不过我还是漫不经心地问，“有何不同“

哈佛公开课 - 幸福课课程节选

And I would ask, as nonchalant as I could of course.

我漫不经心地问。

哈佛公开课 - 幸福课课程节选