农业生态系统

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

发表于:2018-12-08 / 阅读(161) / 评论(0)

VOA2003（上）-科技先知

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

发表于:2018-12-08 / 阅读(246) / 评论(0)

VOA标准英语2012年(十二月)

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

发表于:2018-12-24 / 阅读(140) / 评论(0)

2016年Scientific American(八)月

Agroecology, Part 2

By Mario Ritter Broadcast: October 7, 2003 This is Doug Johnson with the VOA Special English Agriculture Report. Today we finish a two-part series. A listener in Brazil asked about 1)agroecology. This

发表于:2019-01-02 / 阅读(232) / 评论(0)

VOA2003（下）-农业与经济

Agroecology, Part 1

By Mario Ritter Broadcast: September 30, 2003 This is Steve Ember with the VOA Special English Agriculture Report. This week, we take a suggestion from a listener in Brazil. Agricultural specialist Lu

发表于:2019-01-04 / 阅读(223) / 评论(0)

VOA2003（下）-农业与经济

VOA标准英语2011--Automakers Turn Agro-Waste into Car Part

Scientists in Brazil are turning fruit fibers into car parts. At a recent meeting of the American Chemical Society, the researchers described their work in making the next generation of automotive parts made from natural fibers from bananas, pineappl

发表于:2019-01-09 / 阅读(183) / 评论(0)

VOA标准英语2011年(四月)

2007年VOA标准英语-Center Provides New Look at Underwater Environm

By Paul Sisco Washington, DC 21 February 2007 watch New Discovery Center One of the newest attractions for visitors to Florida, the southernmost point in the continental United States, celebrates the undersea world in and around the famous Florida K

发表于:2019-01-12 / 阅读(237) / 评论(0)

2007年VOA标准英语（二月）

2007年VOA标准英语-India, US Making Last-Ditch Bid on Nuclear Agre

By Steve Herman New Delhi 19 July 2007 High-level talks between India and the United States are going into an unscheduled third day in Washington in the hopes of overcoming obstacles to a controversial nuclear cooperation agreement. VOA's Steve Herma

发表于:2019-01-12 / 阅读(236) / 评论(0)

2007年VOA标准英语（七月）

VOA标准英语2012--Attack on Pro-Gbagbo Protestors Draws Criticism from Ivorian Rights Group

Attack on Pro-Gbagbo Protestors Draws Criticism from Ivorian Rights Group Dozens of supporters of former Ivory Coast President Laurent Gbagbo were attacked and injured during a rally Sunday in Abidjan, after opponents began throwing stones. Eric-Aim

发表于:2019-01-13 / 阅读(163) / 评论(0)

VOA标准英语2012年(一月)

VOA标准英语2010年-Foreign Agro Firms Scoop Up Ethiopian

Peter Heinlein | Addis Ababa 22 February 2010 The Green Revolution that ended food shortages in parts of the world decades ago may be coming to East Africa, bringing the promise of bountiful harvests in a region more often associated with drought and

发表于:2019-01-13 / 阅读(171) / 评论(0)

VOA标准英语2010年(二月)

2007年VOA标准英语-Concern Growing in US West Over Agroterrorism

By Jeff Swicord Cheyenne, Wyoming 10 September 2007 Workers at adairy farm There is growing concern that farms and ranches in the western U.S. could become the target of agroterrorism. The devastating outbreaks of foot and mouth disease in Britain a

发表于:2019-02-05 / 阅读(256) / 评论(0)

2007年VOA标准英语（九月）

加州语文教材 G3 V3 Ecosystems in Balance 09

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发表于:2019-02-20 / 阅读(937) / 评论(0)

加州语文教材California Treasures G3

加州语文教材 G3 V3 Ecosystems in Balance 08

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发表于:2019-02-20 / 阅读(227) / 评论(0)

加州语文教材California Treasures G3

加州语文教材 G3 V3 Ecosystems in Balance 07

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发表于:2019-02-20 / 阅读(205) / 评论(0)

加州语文教材California Treasures G3

加州语文教材 G3 V3 Ecosystems in Balance 05

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发表于:2019-02-20 / 阅读(221) / 评论(0)

加州语文教材California Treasures G3

加州语文教材 G3 V3 Ecosystems in Balance 04

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发表于:2019-02-20 / 阅读(228) / 评论(0)

加州语文教材California Treasures G3

加州语文教材 G3 V3 Ecosystems in Balance 03

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发表于:2019-02-20 / 阅读(220) / 评论(0)

加州语文教材California Treasures G3

加州语文教材 G3 V3 Ecosystems in Balance 02

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发表于:2019-02-20 / 阅读(233) / 评论(0)

加州语文教材California Treasures G3

加州语文教材 G3 V3 Ecosystems in Balance 01

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发表于:2019-02-20 / 阅读(249) / 评论(0)

加州语文教材California Treasures G3

加州语文教材 G3 V3 Ecosystems in Balance 06

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发表于:2019-02-20 / 阅读(220) / 评论(0)

加州语文教材California Treasures G3

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antherigona (acritochaeta) oryzae

anthropopathically

anti-Abelian quasigroup

carbon tetrachlorides