I had been careless and let him wander off on his own.我不小心让他自己走失了。

She was bending over the bowl, careless of her hair.她俯身在碗上, 没顾及自己的头发。

If these are chipped by careless handling, rust soon develops.这些东西如果处理不小心被磕破, 很快就会生锈的。

Some mothers were a bit careless with money.有些做妈妈的花钱有点大手大脚。

She's very careless about her clothes.她非常不注意自己的衣着。

He had shown himself to be careless of personal safety where the life of his colleagues might be at risk.在同事的生命可能受到威胁时, 他将个人安危置之度外。

With a careless flip of his wrists, he sent the ball quickly on its way.他手腕随意一抖, 球就快速飞了出去。