rack one's brains
...pocket into the profit of enterprises that the ones that draw camp rack one's brains. The early starting since production only simply of conduct of business, the...
...weigh. Idioms: cudgel one's brains, put on one's thinking cap, rack one's brain. See thoughts
...be the first; to fall over one another; to rival for priority 煞費苦心 to rack one's brains; to go through a lot of trouble; to fall over backwards; to take pains...