现在，我们地质学家自认为对美国西南部大峡谷的形成有了很好的认识。
Now, we geologists thought we had a pretty good idea of how the Grand Canyon in the southwestern United States was formed.
这真是个让人大开眼界的消息，因为阿巴拉契亚山脉当然在大峡谷以东数千公里处。
That's really eye-opening news, since the Appalachian Mountain Range is, of course, thousands of kilometers to the east of the Grand Canyon.
1996年，科学家从大峡谷上方的格伦峡谷大坝放水，造成科罗拉多河实验性洪水。
In 1996, scientists caused an experimental flood of the Colorado River by releasing water from Glen Canyon Dam above the Grand Canyon.
因为有这种新的铀铅定年方法，我们才得以确定我们对大峡谷的一个主要假设是错误的。
Because of this, this new way of doing Uranium-Lead Dating, we've been able to determine that one of our major assumptions about the Grand Canyon was wrong.
两位地质学家发现，约半数的来自大峡谷的沙子实际上曾经是阿巴拉契亚山脉的一部分。
Two geologists discovered that about half of the sand from the Grand Canyon was actually once part of the Appalachian Mountains.
对于更喜欢冒险的人，我们提供了除纯粹的观光以外的奖励——从大峡谷三天徒步旅行到沿长江骑行。
For the more adventurous, we offer rewards beyond mere sightseeing—from a three-day hike across the Grand Canyon to a ride along China's Yangtze River.
旅游建设项目：大峡谷铁链桥、直升飞机旅游项目、水上游乐项目和冰川遗迹地质博物馆。
Establishments projects of tourism: iron chain bridge above the canyon, whirlybird tour project, water amusement, and geographic museum of glacier relics.
我的经验使我感到卑微，无论我多么努力尝试，与大峡谷的威严相比，我的想象是苍白的。
I'm humbled by my experience, and regardless of how hard I try, my images pale in comparison to the canyon's majesty.
黄石河飞流直下大峡谷谷底，形成的“下黄石瀑布”落差高达308英尺（94米）——是尼亚加拉大瀑布的二倍。
The Lower Falls of the Yellowstone River drops a stunning 308 feet (94 meters) to the canyon floor below—twice as big as Niagara Falls.
游客们尽情欣赏大峡谷的景色。
拍摄现场：大峡谷的红墙洞
黄石公园的大峡谷。
在克劳大峡谷的考古之旅，美国。
雅鲁藏布大峡谷是世界上最深最长的峡谷之一。
The Yarlung Zangbo Grand Canyon is one of the deepest and longest canyons in the world.
与其睡在床上，不如睡在往大峡谷路上的巴士上。
Instead of sleeping in your bed, sleep on a bus on the way to the Grand Canyon.
它的赤道之下即是创太阳系之最的大峡谷。
Just beneath its equator is a truly grand canyon that also sets a solar system record.
大峡谷位于美国的亚利桑那州，是地球上的自然奇观之一。
The Grand Canyon is one of the natural wonders of the Earth, located in Arizona in the United States.
大峡谷长久以来一直是现在仍然是美国最穷的地区。
The Valley has historically been, and remains, one of the poorest parts of the country.
看来要想把房车从拉斯维加斯开到大峡谷旅游中心可真不容易。
This is not easy to do when the rear of your vehicle is in Las Vegas and the front is already pulling into the Grand Canyon Visitor Center.
看其中的一些图片，你会觉得自己正在飞越大峡谷或撒哈拉沙漠。
Looking at some of the photos, you feel like you're flying over the Grand Canyon or the Sahara.
合适的山形确就能留住浓雾，或能把水滴注入进大峡谷。
The correctly shaped hill can catch fog, or funnel drip into a canyon.
一个地广人疏的火山高原，一个无可挑剔的标准大峡谷。
A sparsely populated land of volcanic plateaus and large valleys with an impeccable standard for environment.
突发的倾盆大雨向崇敬角附近的大峡谷深处释放了一道锯齿状闪电。
A dramatic cloudburst releases jagged bolts of lightning deep into the Grand Canyon near Point Sublime.
我们顺流直下，漂了几个小时才穿过大峡谷，最后船停了。
We floated down through the canyon for hours until we finally stopped.
当涉及到数据处理能力时，非洲同宽带世界的差距就如同一个大峡谷。
WHEN it comes to computing power, the gap between Africa and the broadband world is still a Grand Canyon.
我开车往西行驶，一路上感到很愉快。我还对“大峡谷”浏览了一番。
I enjoyed the drive west, including a visit in the Grand Canyon.
所以今天我们决定做一次视觉旅行，来欣赏一下雄伟壮观的大峡谷照片。
So, today, we decided it would be fun to take a visual trip through the Grand Canyon with these majestic photographs.
大峡谷内部有着各种多彩的平顶山、峭壁以及有着小峡谷的岬。
The canyon's interior features a wide maze of multicolored mesas, cliffs and headlands that contain smaller canyons.
当夜，我飞往大峡谷，所住阿尔托瓦尔酒店房间的阳台就在大峡谷的边缘。
That night I flew to the Grand Canyon, staying at the El Tovar Hotel in a room with a balcony right on the canyons edge.
大坝热在干旱的西部地区特别厉害，而那儿甚至大峡谷也因洪水而被规划。
The dam binge was particularly acute in the arid West, where even the Grand Canyon was slated for flooding.
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