用心良苦

[yòng xīn liáng kǔ]
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  • 释义

    have cudgeled one's brains;for all one's pains;have expended much care and thought on sth.;have given much thought to sth. ;

  • 用心良苦
  • 更新时间:2025-02-07 20:20:32
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