brain-twister

英 [b'reɪntw'ɪstər] 美 [b'reɪntw'ɪstər]

• n. 难题

例句

用作名词 (n.)

1. The difficult question tasked my brain.
   这个难题让我大费脑筋。
2. Peter racked his brain during the test trying to solve the problem.
   考试时彼得冥思苦想，设法解答难题。