Wǒmen de qiánbèi bìlù-lánlǚ, cái yǒule jīntiān de chéngjiù.
Our predecessors blazed the trail through great hardships, which is why we have today's achievements.
Tips
history
From the 左传 (Xuan 12): 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.
register
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.