44.Obtaining Fresh water from icebergs The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once treated as a joke more appropriate to cartoons than real life. But now it is being con

发表于:2018-11-28 / 阅读(432) / 评论(0) 分类 新概念优美背诵短文50篇

But how did one man and a spear produce the huge force behind this blow? The answer lies with small bits of ivory like this. They were once part of an atlatl, or spear thrower. An atlatl acts as a sort of catapult, magnifying the strength of a hunter

发表于:2018-12-03 / 阅读(60) / 评论(0) 分类 探索与发现2012年

37 Icebergs Icebergs are among natures most spectacular creations, and yet most people have never seen one. A vague air of mystery envelops them. They come into being ----- somewhere ------in faraway, frigid waters, amid thunderous noise and splashi

发表于:2018-12-08 / 阅读(438) / 评论(0) 分类 新概念优美背诵短文50篇

By Rosanne Skirble Washington, DC 31 May 2006 watch Film Review report Al Gore, a longtime advocate for the environment and former vice president of the United States, developed a slide show about the threat posed by global warming. Over the last si

发表于:2018-12-16 / 阅读(133) / 评论(0) 分类 2006年VOA标准英语(五月)

This is Scientific American-60 Seconds Science.Im Julia Roson.Got a minute?The worlds mountain glaciers contain just 1%of all the ice on earth.But their rapid melting accounts for about a third season sea level rise.Most of these glaciers that starte

发表于:2018-12-24 / 阅读(48) / 评论(0) 分类 2015年Scientific American(六)月

Todays Moment of Science digs up the story behind one of the grizzly bears more unusual nicknames: the Rototiller of the Rockies. 今天科学一刻将会深入挖掘灰熊的一个不同寻常的绰号背后的故事,这个绰号就是落基山脉的

发表于:2018-12-28 / 阅读(45) / 评论(0) 分类 初学者听力文摘精选

We're revitalizing a grove of giant Sequoias in Yosemite; repairing the Lincoln Memorial; 我们将重新开放优诗美地的巨杉树林;修缮林肯纪念堂; and enhancing the iconic entrance to our first national park at Yellowstone. 加固通

发表于:2018-12-30 / 阅读(65) / 评论(0) 分类 奥巴马每周电视讲话

By Heda Bayron Hong Kong 05 August 2007 An aerial view of the Siachen Glacier, northwest of Jammu, India U.S. scientists say clouds of man-made haze that blanket southern and eastern Asia are helping accelerate the melting of the Himalayan glaciers.

发表于:2019-01-04 / 阅读(88) / 评论(0) 分类 2007年VOA标准英语(八月)

A massive ice island has broken off the coast of Greenland. Heat waves, droughts and floods have been wreaking havoc across the globe in recent weeks, and now scientists say a 250 square kilometer island of ice has broken off from a glacier in Greenl

发表于:2019-01-13 / 阅读(80) / 评论(0) 分类 VOA标准英语2010年(八)月

From their origins of melting glacier in the high Himalayas, thewaters of Ganges descend more than 12,000 feet, carving their way throughprecipitous gorges. There is half a mile drop. Although the Ganges is steepedin history and religious tradition,

发表于:2019-01-16 / 阅读(59) / 评论(0) 分类 自然百科2015年

Apprentice killers wait for their taste of the chase. But they're about to learn that hell has no fury like a zebra protecting her foal. Older cheetahs know the value of patience. Soon, the herd will move on. Hungry eyes turn to one of the last-born

发表于:2019-01-22 / 阅读(60) / 评论(0) 分类 自然百科2010年

The living is easy. But it won't last long. At this altitude, the air is so dry that rain evaporates before it even hits the ground. The water that flows off the plateau is no longer being replaced. Already there is drought in forests beyond the mead

发表于:2019-01-22 / 阅读(65) / 评论(0) 分类 自然百科2012年

Bison calves are more independent of their mothers. The adults' focus is now set on a ruthless competition to mate. A male bids to enter a herd with females in season. He uses dust to accentuate all his size and power. Another male already establishe

发表于:2019-01-22 / 阅读(46) / 评论(0) 分类 自然百科2012年

Traveling at speeds of up to about 20 miles,they drive the mullet onto the beach.Trapped,the fish have no way to turn.Flattening out their bodies like surf boards,they skim in just inches of water. The surf mums are the only dolphins in the world who

发表于:2019-01-22 / 阅读(47) / 评论(0) 分类 自然百科2013年

A visit to the northern Italian city of Trento, where a unique science museum is making quite a name for itself. The museum has found an original way to showcase the wildlife of the Alps. The exhibition, named From the glacier to the forest, has the

发表于:2019-02-02 / 阅读(86) / 评论(0) 分类 CCTV9英语新闻2014年04月

Study: Warm Ocean Speeds Antarctic Melting The study's lead author, Hamish Pritchard, is a glaciologist with the British Antarctic Survey. In 1993, and again in 2003, he observed the collapse of two ice shelves on the Antarctic Peninsula. He says the

发表于:2019-02-08 / 阅读(60) / 评论(0) 分类 VOA标准英语2012年(五月)

Section 1 Thank you, Mr. Secretary General, for the honor to address this body once more. And thanks to the distinguished climate leaders assembled here today who are ready to take action. 谢谢秘书长先生再次给我机会让我站在这里发言

发表于:2019-02-16 / 阅读(65) / 评论(0) 分类 英语PK台