Sometimes being a mother and a housewife felt like a thankless task.

做母亲和家庭主妇有时使人觉得好像是个受累不讨好的差使。

《牛津词典》

Football referees have a thankless task.

足球裁判的工作费力不讨好。

《柯林斯英汉双解大词典》

What a thankless child you are, just idle and good-for-nothing!

你真是个不知好歹的孩子，整天游手好闲，一无是处！

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At times, scouting can be a thankless profession that puts a terrible strain on family life since the demands of a ball club are so great to find the next big thing.

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The worst reason is Jada Pinkett Smith, who gets stuck with a thankless role as the unwittingly lethal villain a newspaper journalist, of course.

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In many respects this is a great credit to the selectors in charge and I can say without hesitation, that while the role of a selector can be a thankless task, the Australian selectors have generally shown faith in their players and followed a very consistent selection process.

BBC: Justin Langer column