keep your nose to the grindstone
勤奮工作；專注于工作或任務
口語·鼓勵努力工作
英文釋義
to work hard and diligently; to stay focused on tasks and not be easily distracted
例句
If you want to finish the project on time, you'd better keep your nose to the grindstone.
典故來源
源自19世紀磨刀工形象，鼻子貼近磨刀石表示專注工作，后比喻勤奮不懈。