The capital's Western and Southern approaches are sheer vertical walls virtually attack-proof.

都城的西边及南边都是完全垂直的城墙，几乎无法攻击。

You can see the concrete right in front of you deteriorating on the vertical walls.

你可以看到你面前的混凝土在垂直墙壁上不断恶化。

Here I am pushing horizontally on a book on a vertical wall.

这里，我正在垂直的墙壁上水平推一本书。

It must have been nearly three o'clock when we reached a narrow valley gouged between high, vertical walls and located 150 meters down.

这时候，想是快要到三点了，我们到了一座狭小的山谷中，这山谷在峭壁间，在一百五十米深的海底下。

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。

Rock climbing usually involves smaller climbs;you're not climbing up an entire mountain, you may be climbing up just a cliff (that is, the side of a mountain or where there is a vertical wall of rock that you can climb up).

攀岩通常涉及较小的攀登；您不是在攀登整座山，您可能只是在攀登悬崖（即山的一侧或有可以攀登的垂直岩壁的地方）。