Wǒmen de qiánbèi bìlùlánlǚ, cái yǒu le jīntiān de chéngjiù.
Our predecessors blazed the trail through great hardships, which is why we have today's achievements.
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From 《左传·宣公十二年》: 筚路蓝缕，以启山林 — 'In brushwood carts and rags, they opened up mountain and forest.' Originally describing the hardship of founding the state of Chu.
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Highly literary — common in formal speeches, history books, and tributes to founders or pioneers. Don't use for everyday struggles; reserve for genuine pioneering efforts.
