They had to walk across an emergency footbridge, holding onto a rope that served as a rail.
他们不得不抓着当作栏杆用的绳子,走过一架应急人行桥。
《柯林斯英汉双解大词典》
2
You can balance yourself and walk on the rope and nothing would happen.
你可以找到平衡,在绳子上行走,不会出事。
3
The rope-like tendon connects the calf muscles, the gastrocnemius and the soleus, to the heel bone, and is responsible for pushing off when you walk, jump or run.