Decrease in Shark Population Harms Ocean 1)Ecosystems

Broadcast: Jan 16, 2003 Experts say one of the world's most feared, but misunderstood, creatures is under 2) assault by fishermen. A new study of all types of sharks finds that there are fewer of them

VOA标准英语2012--Report: Ecosystems More Stressed Than Ever

Report: Ecosystems More Stressed Than Ever When Super Storm Sandy ravaged the U.S. East Coast and inundated New York City in late October, many wondered if such extreme weather events might be linked to climate change, the gradual warming of the plan

初中英语山东版九年级--Unit 3-A

Unit 3 We're trying to save the manatees! [00:08.18]Section A [00:10.09]Language Goal [00:11.86]Debate an issue [00:14.26]1a Here are some words that describe animals [00:20.53]Write these words in the boxes below. [00:24.48]Then write other words yo

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

科学美国人60秒 SSS Waste Amphetamines Alter Underwater Ecosystems

Last week, tens of thousands of gallons of sewage gushed into urban streams in Baltimore, because of leaky pipes and flooding rains. And when that happens, it's not just organic matter and microbes that get flushed into aquatic habitats. It's drug re

SSS 2009-07-24

This is Scientific Ameican's 60-Second Science. I'm Karen Hopkin. This will just take a minute? Forget the meek. If the Earth keeps getting warmer, a recent study shows that its the small that are gonna come out on topat least in the worlds oceans. W

SSS 2009-03-12

This is Scientific American's 60-Second Science. I'm Adam Hinterthuer. Got a minute? Farmers fertilize their fields to get the maximum meal from their crops. But the effects of these loads of nitrogen and phosphorous extend beyond the field and past

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

2006年VOA标准英语-Scientists Study Asian Snakehead Invasion of Po

By Malcolm Brown Washington, D.C. 24 November 2006 watch Snakehead report An aquatic interloper appears to have adjusted easily to life in the Potomac River system near Washington, DC -- far from its native Asia, where it is regarded as a delicacy.

VOA标准英语2012--Public Hearings on Popular Pesticide Spotlight Safety Concerns

Public Hearings on Popular Pesticide Spotlight Safety Concerns Every year, U.S. farmers apply more than 35 million kilograms of the pesticide atrazine on their fields of corn, sugarcane, sorghum and other crops. But a growing body of scientific evide

VOA标准英语2013--Scientists Ponder 'Epoch' of Damage to Global Water System

Scientists Ponder 'Epoch' of Damage to Global Water System Scientists say a new geologic epoch has begun whereby humans are causing major damage to global water systems. They warn of a planetary transformation comparable to the retreat of the glacier

WildAid Shark Protection

WildAid, an international environmental conservation organization, protects endangered species through communication campaigns aimed at raising awareness of the threats facing wildlife all over the world. With the support of celebrities like Chinese

【英语时差8，16】海洋最需

Don: Today, on A Moment of Science, the Ocean's Most Wanted. Sure, they might seem innocent and downright lovely in your aquarium, but released into the wild, your plants and fish can knock aquatic ecosystems right out of balance. Today's invasive sp

雅思分类词汇：环境资源相关(六)

海洋环境MARINEENVIRONMENTS 海洋生态系统Marineecosystems 藻花Algalbloom 海底生态系统Benthicecosystems 海洋污染Marinepollution 污染沉积物Marinesediments 海洋环境Oceancircul

雅思阅读词汇：热带雨林(1)

热带雨林 Tropical Rainforest abounding adj. 丰富的，大量的 accelerate v.加速，促进 arce n. 英亩 alkaloid n. 生物碱 an intricate and fragile system 复杂脆弱的系统 angler n.钓

加州语文教材 G3 V3 Ecosystems in Balance 01

图片1 图片2

加州语文教材 G3 V3 Ecosystems in Balance 06

图片1

留美老师带你每日说英文 第464期:动物粪便的奇异功能

台湾籍旅美老师今天交给我们的句子是： And farmers know the importance of waste in raising their crops, but feces aren't just for fertilizing. According to some research, millions of tons of dung enters Africa's aquatic ecosystems eve

英语听力文摘 English Digest 239、外来物种入侵

Oceans Most Wanted 伴随着人们的经济活动和国际交往，一些物种由原生存地借助于人为作用或其他途径移居到另一个新的生存环境并在新的栖息地繁殖并建立稳定种群，这些物种被称为外来物种。