rack one's brains;bestow great care upon;cudgel one's brains;go through a lot of trouble ;

The most elaborate measures are taken to ensure a constant water supply.
为保证持续不断地供水,采用了煞费苦心的措施.
来源:词典精选例句They grabbed what they could get for the sake of what was to be got.
为了能捞到想得到的东西,不惜煞费苦心,巧取豪夺.
来源:词典精选例句He was madly destroying the machine which had cost him so much pains to build.
他发狂地在破坏他那煞费苦心制成的机器.
来源:词典精选例句
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