keep your nose to the grindstone
勤奋工作；专注于工作或任务
口语·鼓励努力工作
英文释义
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.
典故来源
源自19世纪磨刀工形象，鼻子贴近磨刀石表示专注工作，后比喻勤奋不懈。