| 词汇 | 劳而无功 |
| 释义 | 劳而无功劳而无功[láo ér wú gōng]1.■toil with no gain; a fruitless attempt; All one's efforts came to naught.; exert oneself to no purpose; labour lost; lost labour; make futile efforts; much cry and little wool; toil in vain; work hard but to no avail |
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