brain-teaser

The answer reminded me of a brain-teaser that's been entertaining me for the past couple of months.

这个回答让我想起了几个月来一直在思考的一个脑筋急转弯问题。

Then both groups took the brain-teaser test again.

随后这两组学生要再做一次脑筋急转弯测试。

-Don't panic when you first hear a brain-teaser question.

当你第一次被问及脑筋急转弯问题时，不要慌张。

In conclusion, I would like to leave you with a brain teaser.

最后, 大家来动动脑筋.

Back when they were the evil empire where everyone secretly wanted to work, they were famous for their "brain-teaser" interview questions – Why are manhole covers round?

当微软还是一个人人都暗自想去工作的邪恶帝国时，就以用令人绞尽脑汁的问题面试而著名。例如：为什么井盖是圆的？

Similar brain-teaser programs are available on home computers, sometimes free of charge.

类似“脑袋瓜回春的”电脑软件也可以装在家里的电脑, 有些软件甚至免费的.