It was thoughtless of her to mention it...

a thoughtless remark

欠考虑的话

It was very thoughtless of me , I shall have written you a letter.

我考虑不周, 没有给你写封信.

It was very thoughtless of you to do so.

你这麽做真是非常轻率.

Moreover, a thoughtless act or remark can spoil a perfect relationship.

此外, 欠缺考虑的行动或言论也可能会破坏完美的关系.

It was thoughtless of you to eat all the cake and leave none for me.

你把蛋糕都吃了,一点也不留给我,这太自私了.

I wonder why you are so thoughtless of others.

我很奇怪,你为何如此不替别人着想.

Thoughtless speeches may work great mischief.

不加考虑的言论可能严重时危害人心.

This is because there are many careless and thoughtless people.

这是因为有许多粗心大意之人.

...a small minority of thoughtless and inconsiderate people...

一小群只顾自己、不顾别人的人

Adolescents are prone to make decisions and to act thoughtlessly, without anticipating possible consequences.

青春期少年在做出决定和采取行动时往往有欠考虑, 不会预见可能发生的后果.

To chatter thoughtlessly or at length.

缺少考虑地或冗长地说话.

We can no longer thoughtlessly use the many resources provided by nature.

我们已不能再不假思索地使用大自然所赐予我们的资源了.

It is also a very serious matter when someone-deliberately or thoughtlessly-pollutes our water supplies.

人污染水源,是蓄意也好,无心也罢,后果都会非常严重.

He stared thoughtlessly at the picture.

他漫无目的地盯着照片.

A principle is involved, a life-and-death principle which is repeatedly and thoughtlessly violated.

这牵涉到一条原则, 一条一再被无情地违犯的生死攸关的原则.

The plumbline generation has already consolidated itself and has thoughtlessly killed the ideal of the impossible.

垂直线世代的人已经巩固了他们的地位,并草率地谋杀了不可能的概念.

He treated his parents thoughtlessly.

他非常不关心他的父母.

The principle is repeatedly and thoughtlessly violated.

这条原则被一再无情地违犯着.

I had no idea that I was saying something that was painful. Please forgive my thoughtlessness.

我不知道我说的话会那么令你痛苦. 请原谅我的疏忽.

This poison is a thousand-fold more toxic.

这种毒药毒性非常大.