听力原文

Filmed in near darkness using a night vision camera, the troop clambers along familiar ledges worn smooth by generations before them.
夜视镜在近乎黑暗的坏境下记录下了叶猴一家爬上被数代猴族磨蚀光润的石壁的情景。
During cold winter weather, the monkeys venture deeper underground where the air stays comparatively warm.
当冬日寒冷来袭，猴子们则冒险潜入空气相对保持温暖的地下。
At last, journey's end. A cosy niche beyond the reach of even the most enterprising predator.
最后，到达旅途的终点。高悬的庇护所使得最激进的捕食者都束手无策。
But it's not just monkeys that find shelter in caves. These children are off to school.
并非只有猴子们在洞穴中寻找遮蔽。这些孩子们刚放学。
In rural China that may mean a long trek each morning, passing through a cave or two on the way.
在中国农村每天早上都意味着一段穿越一两个洞穴的艰苦跋涉。

重点讲解

重点讲解：
1. at last
终于；最后；到底；
eg. He showed his sinister motive at last.
他终于露出了他那邪恶的用心。
eg. Your efforts will not come to no avail, if you can achieve something at last.
如果最后你能够有所成就，你的努力就不会白费。
2. beyond the reach of
够不着，达不到，超出…的范围；
eg. It's beyond the reach of human aid.
那是人力所不及的。
eg. His thought is beyond the reach of my imagination.
他的思想不是我所能想像得到的。
3. on the way
在途中；
eg. I had a puncture on the way and arrived late.
我在路上扎破了轮胎，所以迟到了。
eg. I got caught in the deluge on the way home.
我在回家的路上遇到倾盆大雨。