例句 |
head-scratchersnounpl. of head-scratcher something hard to understand or explainwhy he chose to sink all of his money into a failing business is a real head-scratcher closed books, conundrums, enigmas, mysteries, mystifications, puzzlements, puzzles, riddles, secrets, whys brainteasers, cases, challenges, knots, matters, perplexities, posers, problems, stumpers, troubles |