It was careless of me to leave the door open.

怪我粗心忘了关门。

《牛津词典》

I'm sorry. How careless of me.

对不起，我太粗心了。

《柯林斯英汉双解大词典》

He seemed careless of his own safety.

他仿佛已把自己的安危置之度外。

《牛津词典》

"It is really pollution from our own use of space. Over the last 50 years we have been a bit careless, just as we have been careless with our oceans and rivers over centuries and polluted them.

VOA: standard.2010.07.24

I'll take every view that Socrates puts forward as a view of Plato's, though I'll typically sort of run back and forth sort of in a careless fashion.

我会把苏格拉底提出的,所有观点都当做是柏拉图的,尽管我会随意地,将两者交替着说

耶鲁公开课 - 死亡课程节选

They appear increasingly careless of the damage they are doing to themselves and are too susceptible to peer pressure.

BBC: NEWS | Health | Fears over rise in child drinking

Goodyear was a dreamer, careless of his appearance and indifferent to money.

FORBES: Pioneers Die Broke

So, Mr Romney is not that careless of the company he keeps.

BBC: Republicans haunted by ghosts of Katrina