勞而無功

láo'érwúgōng

work hard but to no avail; work fruitlessly

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láo ér wú gōng

v. work hard but to no avail, work fruitlessly

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lao2 er2 wu2 gong1

to work hard while accomplishing little, to toil to no avail

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勞而無功|劳而无功 [láo ér wú gōng] ► to work hard while accomplishing little ► to toil to no avail