At these altitudes, 海拔如此之高

221. Walking on thin ice is always risky.
     走在薄冰上总是危机四伏
222. And it's hard to retain one's dignity...
     而且当你踩着高跷的时候
223. ...especially when you're wearing stilts.
     哪还顾得上体面和优雅
224. At these altitudes,
     海拔如此之高
225. the sun's power can quickly turn from salvation to threat.
     太阳的热力很快从救星变成了威胁
226. The atmosphere is so thin,
     由于大气稀薄
227. there is very little protection from ultraviolet radiation.
     无法阻挡紫外线的辐射

来自《行星地球 第二季 第二集 Planet Earth S02E02 山脉》第 224 行