1·It astonishes me (that) he could be so thoughtless.
我真没有料到他会如此轻率。
—— 《牛津词典》
2·I seem to be in evil case—and all for an innocent and thoughtless pleasantry.
我似乎陷入了不幸的境地——而这一切都是出于一种天真而轻率的玩笑。
3·She didn't dare to do anything thoughtless, otherwise she would lose her second son.
她不敢做任何轻率的事情，否则她将失去第二个儿子。
4·Thoughtless boys defaced the gate of the school with rude message in blue paint.
轻率的男孩们用蓝油漆在学校大门上涂写了一些粗鲁话。
5·She forgave him his thoughtless remark.
她原谅了他轻率的话语。
1·Very thoughtless of him, I call it.
我认为他太粗心了。
2·YouTube is a vast collective experiment to invent the future of television, one thoughtless, wasteful upload at a time.
YouTube就是一个巨大的实验室，通过一次次粗心，一次次上传来探索未来的电视。
3·How can I be so thoughtless?
我怎么会这么粗心呢？
4·It was thoughtless of you to forget your mother's birthday.
你太粗心了，居然连你妈妈的生日也忘了。
1·"I recognise my action was a thoughtless one," he said.
我知道自己的行为欠缺考虑。
2·Simpson's thoughtless remarks put him behind the eight ball, and many people thought he should resign.
辛普森欠缺考虑的评论使他处于尴尬的境地，很多人认为他应该辞职。
1·It was a thoughtless remark and I regretted it immediately.
这是一句欠考虑的话，我马上就后悔了。
—— 《柯林斯英汉双解大词典》
2·I should never have sent that valentine-forgive me-it was a thoughtless thing to do.
我不该寄那张情人卡——请原谅——那样做是欠考虑的。
3·This is because there are many careless and thoughtless people.
这是因为有很多粗心大意和欠考虑的人们。