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》

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》

SAVING the world is a thankless task.

拯救世界是一个费力不讨好的任务。

youdao

American generals have been surprised and gratified by their allies' grit in a largely thankless task.

ECONOMIST: The future of the transatlantic alliance

Peeling away the layers of misunderstanding about them is a difficult and thankless task.

FORBES: Anatomy of (Yet Another) Hedge Fund Fraud (June 1, 2001)

Reading the terms of service and privacy policies on the websites you visit is a thankless task.

FORBES: Firefox Privacy Plug-In Reads The Fine Print So You Don't Have To