河马对生态系统的意义

河马对生态系统的意义 A new study says the hippopotamus is very important to the health of Africas rivers and lakes. Thats because hippos produce a key ingredient for aquatic life -- and a lot of it. But researchers warn that hippo populatio

VOA标准英语2015--河马创造了河流生命力

Hippos Called River Life Force 河马创造了河流生命力 A new study says the hippopotamus is very important to the health of Africas rivers and lakes. Thats because hippos produce a key ingredient for aquatic life -- and a lot of it. But resear

英国学生科学读本 第85期:可可与巧克力(2)

Some people like to make their cocoa by boiling the nibs in water. 有些人喜欢用水来煮可可粒, When this is done, a layer of cocoa-butter is formed on the top of the cocoa. 这样一来, 可可的上面就会形成一层可可脂。 But mos

【突破英文词汇】solv, solu -- loosen 松开

1. dissolution /ˌdɪsəˈlu:ʃən/ -- act of loosening or breaking up into component parts; disintegration; ruin; destruction When President Lincoln took office, the Union faced imminent dissolution. 当林肯总统就职时，北军就面临着迫切

SSS 2008-03-27

This is Scientific American's 60-Second Science. I am Cynthia Graber. This will just take a minute. Brains can register a foods caloric value independent of our taste buds, say scientists from Duke University and from Portugal. First the scientists e

SSS 2011-01-25

This is Scientific Americans 60-Second Science. Im Cynthia Graber. This will just take a minute. The Chesapeake Bay could get helped by a new antipollution expert: farmed oysters. For decades, the Chesapeake has been plagued by excess nutrients, such

VOA慢速英语20060228a

AGRICULTURE REPORT - Bird Flu: Composting the Remains of Farm BirdsBy Mario Ritter Broadcast: Tuesday, February 28, 2006 I'm Steve Ember with the VOA Special English Agriculture Report. Farmers usuall

专业术语—口腔生理学术语P2(英文详解)

pH - a measure of how acid or alkali a solution is. As the pH gets lower, the solution is more acid. At a pH of 7 the solution is neither acid nor alkali. pH is the inverse of the logarithm of the con

Home Gardens, Part 1

By Mario Ritter Broadcast: September 9, 2003 This is Steve Ember with the VOA Special English Agriculture Report. For many people, growing crops on a small piece of land is not a business. For them, a

VOA标准英语2012--Potomac Named Most Endangered River

Potomac Named Most Endangered River The Potomac River is seen by hundreds of thousands each day as it flows under bridges and past memorials. It is used for recreational activities, and provides drinking water for five million people. Before the Poto

VOA标准英语2010年-Computer Model Helps Minimize Water Po

The US Environmental Protection Agency lists stormwater as the primary cause of water pollution in the United States. Roads, shopping centers and housing developments are generally seen as enhancing a community's quality of life. But they can also di

SSS 2011-12-12

Cooking is one big science experiment and chefs have been gaining fame for more explicit uses of scentific techniques and tools in the kitchen. Now, according to an article in the December issue of physics world, mixologists the folks behind the bar

VOA慢速英语2015 河马:非洲河流的生命力量

AS IT IS 2015-05-03 Hippos: The Life Force of African Rivers 河马:非洲河流的生命力量 The hippopotamus is an animal very important to the health of Africa's rivers and lakes. Their dung, or solid waste, helps Africas aquatic ecosystem. But

2007年VOA标准英语-Chesapeake Bay Faces Environmental Degradation

By Zulima Palacio Washibgton, D.C. 19 April 2007 Watch Chesapeake Bay report The Chesapeake Bay has the longest coastline in the eastern United States -- nearly 19,000 kilometers long, stretching through and bordering six states. Thousands of rivers

英语听力—环球英语 1274 Food in Danger, Part 2

Voice 1 Welcome to Spotlight. Im Robin Basselin. Voice 2 And Im Ryan Geertsma. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 All over the world, the pri

Bottled Water Healthier?

Bottled water, including mineral and purified water, has become part of our lives. But now there is a wide variety of conceptual bottled water on the market that is extremely expensive, such as glacier water and bamboo charcoal water. Almost all of t

Bottled Water - Safe to Drink?

Bottled water, including mineral and purified water, has become part of our lives. But now there is a wide variety of conceptual bottled water on the market that is extremely expensive, such as glacier water and bamboo charcoal water. Almost all of t

维他命饮料 究竟是好是坏

Companies are increasingly adding vitamins and minerals to juices, sports drinks and bottled water, responding to a growing consumer demand for these products. Even though the amounts of added nutrients in these drinks are typically small, some nutri

多吃芹菜 健康好处多多

1. It is very hydrating. 盈润保湿。 Celery is high in water content (95% water) and electrolytes, which are vital for proper hydration and cellular functions. For a super re-hydrating drink (e.g. after a long flight or after having food poisonin

万物简史 第357期:孤独的行星(22)

Oxygen itself is not combustible; it merely facilitates the combus tion of other things. （氧本身是不可燃的，它只是帮助别的东西燃烧。 This is just as well, for if oxygen were corn bustible, each time you lit a match all the air