do a hard but thankless job
... do a good job 好好干，干得好; 好好干；干得好 do a hard but thankless job 费力不讨好 do a remarkable job 干得很出色 ...
a thankless job
费力不讨好，汉语词汇，拼音为fèi lì bù tǎo hǎo，是白费功夫没成效的意思。
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