〈英,非正式〉非常聪明的人。
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However, one doubting brainbox has devised a 'test for a test' to see if those who are sharing the solution to the problem really do know their stuff.
不过,一位持怀疑态度的聪明人又设计了一道“测试中的测试”,想看看那些分享这则测试的人是不是真的看懂了。