I stared at the last rays wreathing this peak, while shadows were gradually climbing its gradients.

我注视那照在尖峰顶上的最后阳光和那从尖峰层峦渐次上来的黑影。

In reality, they just built them at a different gauge because Spain is more mountainous and wider tracks allow for larger, more powerful engines which can climb a steeper gradient.

事实上，他们只是以不同的规格建造了它们， 因为西班牙多山，更宽的轨道允许更大、更强大的发动机， 可以爬上更陡的坡度。