沿着陡峭的道路驱车前往马丘比丘的印加遗址山顶是很危险的，在那里徒步旅行也很困难。
Driving the steep road to the mountaintop Inca ruins of Machu Picchu is potentially dangerous and hiking there is difficult.
这条铁路与自然垄断有关︰其他到达马丘比丘遗址的唯一方式，就是沿着印加小径徒步旅行四天。
The railway involves a natural monopoly: the only other way of getting to the ruins is a four-day hike along the Inca Trail.
（照片中）她摇摇欲坠的站在山崖旁俯瞰秘鲁的马丘比丘印加遗址，这使我有些紧张。
She is shown here standing precariously on a cliff. It makes me nervous to look at it overlooking Machu Picchu in Peru.
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