搜肠刮肚

Explanation: Compared their brains trying to come hard like. 　　Usage: Joint type; as predicate, adverbial; for human 　　Source: Ming Feng Weimin "no underlying old" First off: "a home Souchangguadu, I do not know hunger, thirst do not know, and could feel in the mouth puff." 　　Examples: Qing Pu "mass truancy": "seems that the composition is, ~, can be written on what?" 　　Riddle: Butcher cut open Thesaurus:  go to great pains, deliberately planning, work hard and carefully to keep one's business going, elaboration, painstaking accomplishment, rack one's brains, Deep thinking, make extraordinarily painstaking efforts, lucubrate, cudgel one's `brains think very hard, Of peaceful contemplation search for, make painstaking efforts, think twice about doing sth., Puzzle, to manage with great pain Antonym Group:  Lver Caogu, regard … as a trifling matter