It's only when you have a single rope can you say that it's the same tension.

只有当你只有一根绳子时，你才能说它是相同的张力。

For these hard core sport climbers, it isn't just about reaching the top, it's about finding the toughest possible route up and down the peak, scaling near vertical walls, suspending from a single rope, and rappelling into the abyss.

对于这些硬核运动登山者来说，这不仅仅是要到达顶峰，而是要找到最艰难的路线上下山峰，在垂直的墙壁附近攀爬，从一根绳索上悬垂下来， 然后下降到深渊。