漫不经心的

His unthoughtful comment upset her deeply.
他的无心之言深深地伤害了她。
She felt guilty for her unthoughtful behavior at the party.
她对自己在聚会上的粗心大意感到内疚。
It was an unthoughtful mistake, and I apologize for it.
这是一个无意的错误，我为此道歉。
He seemed so absorbed in his thoughts that he was almost unthoughtful to others.
他似乎全神贯注于思考，对别人几乎毫不关心。
Her unthoughtful response showed she didn't fully understand the question.
她不假思索的回答表明她并没有完全理解问题。
The teacher criticized the student for his unthoughtful answer.
老师批评学生没有经过深思熟虑的答案。
Don't be so unthoughtful; think about how your words might affect others.
别这么粗心大意，想想你的话可能会对别人造成什么影响。
His unthoughtful decision led to serious consequences for the company.
他鲁莽的决定给公司带来了严重的后果。
It's important to consider others' feelings before acting in an unthoughtful manner.
在轻率行事之前，考虑别人的感受很重要。
She resolved to be more thoughtful in her interactions with friends after the incident.
经过那次事件后，她决心在与朋友交往时更加体贴入微。