human encroachment is changing even the highest summits. 人类的侵犯甚至影响到顶峰的环境状况

252. seem a symbol of permanence,
     似乎象征着永恒的岩石山峰
253. are more fragile than they appear.
     其实要脆弱得多
254. Today in the Alps,
     如今在阿尔卑斯山
255. human encroachment is changing even the highest summits.
     人类的侵犯甚至影响到顶峰的环境状况
256. In the Rockies,
     在落基山脉
257. rising temperatures are shortening winter hibernation
     升高的气温缩短了冬眠的时间
258. and stifling the growth of valuable food plants.
     也阻碍了食料植物的生长

来自《行星地球 第二季 第二集 Planet Earth S02E02 山脉》第 255 行