冥思苦索

Explanation: Their brains trying to come hard like. 　　Usage: Joint type; as predicate, object, adverbial; for written language 　　Source: Ming Hu Ying-lin "Poetry Tau woven II": "Xie Zhu Quotes, more food for thought hard cable." 　　Examples: Only fools, he is a person, or gather together a bunch of people, not for investigation, but only ~ to think of ways to "targeting. (Mao Zedong," Oppose Book Worship ") Thesaurus Group:  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, Bruising, Of peaceful contemplation search for, make painstaking efforts, think twice about doing sth., Puzzle, to manage with great pain Pakistan, after the former operator, ponder over, beat one's brains, contemplate, think from different angles Antonym Group:  Lver Caogu, regard … as a trifling matter