| 单词 | brain buster |
| 释义 | > as lemmasbrain buster brain buster n. a particularly difficult problem or puzzle. ΚΠ 1924 Oakland (Calif.) Tribune 25 Nov. (Daily Mag. section) 4/1 Neophyte..must have heard the groans from the breasts of puzzlers poring over his brain-buster. 2003 J. L. Hein Discrete Math. vi. 377 Some proofs are straightforward, while others can be brain busters. < as lemmas |
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