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・We have to keep our nose(s) to the grindstone. (いやでも)せっせと働🔗🔉

・We have to keep our nose(s) to the grindstone. (いやでも)せっせと働かなければならない.

研究社新英和大辞典 ページ 208062 での・We have to keep our nose to the grindstone. せっせと働単語。