苦心经营

苦心经营 [kǔ xīn jīng yíng]

1. ■ mastermind with painstaking effort; be elaborative in the undertaking; manage painstakingly; painstakingly build up (an enterprise, etc.); rack one's brains for ways and means to try making the enterprise a success; take great pains to build up; work out with unsparing efforts:

他们苦心经营的服装商店也以失败而告终。 The garment store they so painstakingly built up also ended in failure.