Two geologists discovered that about half of the sand from the Grand Canyon was actually once part of the Appalachian Mountains.
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。
In 1996, scientists caused an experimental flood of the Colorado River by releasing water from Glen Canyon Dam above 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。
Now, we geologists thought we had a pretty good idea of how the Grand Canyon in the southwestern United States was formed.
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。
That's really eye-opening news, since the Appalachian Mountain Range is, of course, thousands of kilometers to the east of the Grand Canyon.
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。
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.
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。
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.
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。
My colleague, the philosopher Tamar Gendler, describes the Grand canyon Skywalk, a glass walkway that extends 70 feet from the canyon's rim.
我的同事，哲学家塔玛·詹得勒讲过大峡谷空中飞道，是一个从大峡谷的边缘延展了70尺的玻璃通道。
Just like this California condor, which-though teetering on the edge of extinction-still soars near the Grand Canyon in Arizona and in the state it was named after.
就像加利福利亚秃鹫，虽然依旧翱翔于亚利桑那和加利福利亚的大峡谷附近，但已在灭绝的悬崖边摇摇欲坠。
In the Grand Canyon State, every license plate reminded us that water changes the face of the land, splitting open rock desert like a peach, leaving mile-deep gashes of infinite hue.
这个大峡谷之州每一个车牌照都提醒我们：水改变了世界面貌，像使桃子开裂一样水劈开了石漠，留下了若干个色彩各异的数英里深的裂缝。
In this winter shot of the Grand Canyon by Michael Nichols, it is the single touch of sunlight that makes the photograph work.
迈克尔·尼克斯在冬天拍摄了这张大峡谷的照片，出彩的地方就是阳光照亮的那一点。
A dramatic cloudburst releases jagged bolts of lightning deep into the Grand Canyon near Point Sublime.
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。
Looking at some of the photos, you feel like you're flying over the Grand Canyon or the Sahara.
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。
I made the announcement with Al Gore on the edge of the Grand Canyon, which Theodore Roosevelt had first protected under the Antiquities Act.
我和艾尔·戈尔站在大峡谷边缘，宣布这件事，西奥多·罗斯福依据《古文物法》第一个保护的就是这个大峡谷。
When one visits the Grand Canyon, they are literally looking into the past, and seeing the layers of rock from past eras.
当游客来游览大峡谷时，他们实际上是在回顾历史，观察过去时代形成的各种岩层。
From the awe-inspiring Grand Canyon to the American masterpiece that is Mount Rushmore, these are the sites that stamp our country’s soil with history, intrigue and legacy.
从令人惊叹的大峡谷到美国的杰作拉什莫尔山，这些都是印刻在我们国家土壤上的历史、文化和遗产的标记。
It's like spray-painting the Grand Canyon, or drawing a mustache on the Mona Lisa. Why would anyone do something like that and ruin it for everyone else?
这就像在大峡谷上喷漆一样，或是在蒙娜丽莎脸上画上胡子，怎么会有人做这样的事，把别人的快乐都毁了？
Perhaps most surprising is the remarkable resemblance the region bears to the valleys found in the driest areas on Earth, in particular the Grand Canyon.
而最让人感到惊奇的也许是该地区的险峻地貌与地球上最为著名的大峡谷的部分地貌异常的相似。
The dam binge was particularly acute in the arid West, where even the Grand Canyon was slated for flooding.
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。
Grand Canyon of the Yellowstone.
黄石公园的大峡谷。
WHEN it comes to computing power, the gap between Africa and the broadband world is still a Grand Canyon.
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。
The Colorado River flows through the Grand Canyon. The Canyon offers a lot of information about the physical history of Earth.
科罗拉多河流经大峡谷，大峡谷向我们提供了许多有关地球自然历史的信息。
So, today, we decided it would be fun to take a visual trip through the Grand Canyon with these majestic photographs.
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。
However, in the four decades since thebuilding of the Glen Canyon dam, just upstream of the Grand Canyon, the onlysediment that it has collected has come from tiny, undammed tributaries.
然而，自从四十年前建起格兰峡谷大坝，仅大峡谷上游唯有能从微小的、无坝的支流中收集到沉积物。
On the remote Hermit's Trail off the South Rim of the Grand Canyon, a rare occurrence of rain brings joy to a cold November day.
时下正值冬季，天寒地冻，举目萧条。在大峡谷南缘的隐士步道——美国的西北角落，一道彩虹罕见地划空而出，叫人好生欢喜。
It made me feel that I could relax and not worry that the conversation was going to slide into the Grand Canyon of medical awkwardness.
它让我觉得我可以放松自己，不用担心接下去的对话会掉进医疗尴尬的大峡谷。
The crowded overlooks should be experienced, but don't stop there. For me, the Grand Canyon is the “unsolvable puzzle.
全景俯瞰必不可少，但不能局限于此，对我来说大峡谷仍是一个“未解之谜”。
The interior secretary, Ken Salazar, visited the Grand Canyon and drew on its history to urge patience, caution and humility in moving forward with what has been a controversial process.
内务部长肯·萨拉查曾到大峡谷实地考察，考虑到大峡谷的历史，提出要稳步、谨慎、小心地推动这项争议性计划。
Almost everyone knows a 75-year-old who sky-dives, hikes the Grand Canyon or runs a family business.
几乎每个人都接触过75岁还跳伞、徒步穿越科罗拉多的大峡谷，或是经营家族企业的人。
Almost everyone knows a 75-year-old who sky-dives, hikes the Grand Canyon or runs a family business.
几乎每个人都接触过75岁还跳伞、徒步穿越科罗拉多的大峡谷，或是经营家族企业的人。
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