VOA常速英语2018--鼠类过多不利于岛屿生态健康

According to the study, rats have decimated seabird populations across 90 percent of the worlds island archipelagos. Professor Nick Graham of Lancaster University in Britain says at a recent visit at the Chagos archipelago in the Indian Ocean, there

初中英语人教版九年级02

[00:02.55]第三单元 五大湖 [00:05.09]Lesson 9 1 Read and act [00:08.18]第九单元 读和表演 [00:11.26]Hey Kevin, where did you say you were born? [00:13.53]嗨,Kevin,你说你在哪里出生的? [00:15.80]I was born in Michigan, USA. [00:1

VOA标准英语2011--Illinois' Solution to Asian Carp Invasio

Illinois' Solution to Asian Carp Invasion: Eat Them The Asian carp, a species of fish brought from China to the U.S. several decades ago, is a growing concern in the midwest state of Illinois. The number of Asian carp in the states waterways has soar

VOA标准英语2013--Exhibit Highlights Butterfly's Beauty, Diversity, Value to Ecosystem

Exhibit Highlights Butterfly's Beauty, Diversity, Value to Ecosystem Flying Canvases They are gentle, colorful creatures that move with grace and flair. And in a warm and humid enclosure at the Smithsonians National Museum of Natural History in Washi

SSS 2009-05-29

This is Scientific Americans 60-second Science. Im Karen Hopkin, This will just take a minute. Have you ever said, I know it like the back of my hand? Well, how well do you know the back of your hand, or the back of your knee, or behind your ears? Pr

英语听力：自然百科 马蹄蟹与人类（一）

As the water is warm and tides grow high, horseshoe crabs leave the ocean floor and make their way to the shores and estuaries of the Atlantic Coast. Here in the sheltered waters of South Carolina, they suddenly emerge by the thousands in the spawnin

PBS高端访谈:气候变化对大堡礁造成致命威胁

JUDY WOODRUFF: The Great Barrier Reef along the coast of Australia is considered one of the greatest natural wonders of the world. It actually consists of more than 2,900 smaller reefs and 900 islands and countless species of fish. But its health and

科学家根据海洋的颜色测量其健康度

Scientists Measure Ocean Health by Its Color 科学家根据海洋的颜色测量其健康度 You wouldn't order phytoplankton from a menu, but these microscopic green algae are an important food. The

Quora精选：哪些知识最毁三观

What Is The biggest Mindfuck Ever? 哪些知识最毁三观？ 得票最多的回答 @Henry Johnson 1. The continents look entirely different than you think they do. 1.大陆板块本来的样子跟你认为的完全不一样。 The map youre used to

VOA慢速英语 2008 1202a

This is the VOA Special English Agriculture Report. The search for new fuels has led some researchers to algae. Algae is a name for thousands of different organisms. They include single-celled plants as well as kelp and other large plants. Blue-gree

VOA慢速英语 2008 1202b

This is the VOA Special English Agriculture Report. The search for new fuels has led some researchers to algae. Algae is a name for thousands of different organisms. They include single-celled plants as well as kelp and other large plants. Blue-gree

VOA标准英语2010年-Invasive Asian Carp Threaten Ecosystem

Asian Carp now outnumber native fish in many areas of the United States and their expansion particularly threatens the fragile ecosystems of the Great Lakes. In an effort to control algae growth, catfish farmers in the southern United States introduc

VOA标准英语2010年-Conservation Groups in Coastal Kenya W

Kenya's ocean waters are home to five out of the world's eight species of turtles. All are classified as either endangered or critically endangered, and are threatened by poaching, fishing nets, development and pollution. The conservation groups Wata

VOA标准英语2011--Species Loss Compromises Earth’s Vital

Species Loss Compromises Earths Vital Systems Scientists have long thought that diverse ecosystems like forests, lakes and streams are especially good at removing pollutants that human activities put into the environment. A new study in the journal N

VOA标准英语2013--Bacteria Thrive on Ocean Plastic Debris

Bacteria Thrive on Ocean Plastic Debris It takes about six weeks for a plastic bag or bottle to ride the surface currents from the U.S. East Coast to the Sargasso Sea, in the center of the North Atlantic. The area is a gyre, essentially a big whirlpo

60秒科学:Bacteria on the Skin You're In

Have you ever said, I know it like the back of my hand? Well, how well do you know the back of your hand? Or the back of your knee? Or behind your ears? Probably not as well as scientists at the National Institutes of Health who just completed a sur

英语听力精选进阶版 6375

It's not every day that you find a motorcycle or a concrete dock washed ashore, but that's what people on the West coast of the United States have been spotting. These items were among debris from the March 2011 tsunami in Japan. It's been estimated

工作时间看世界杯的乐趣

Ive been a World Cup enthusiast for longer than I care to admit, but I still dont consider myself any kind of expert on soccer. I have, however, become an expert on watching World Cup matches during work hours. Im taking the risk of getting fired for

万物简史 第441期:小生物的世界(12)

In the early days, this was an exceedingly painstaking process. 早年，这是个极费力气的过程。 Work on a single bacterium could easily consume a year. 研究一个细菌就可能一下子花掉一年时间。 At that time, according to Wo

万物简史 第437期:小生物的世界(8)

In 2001, a team from Tel Aviv University argued that B. permians were almost identical to a strain of modern bacteria, Bacillus marismortui, found in the Dead Sea. 2001年，以色列特拉维夫大学的一个小组认为，二叠纪芽孢杆菌与一