沙丘链

Is Water Really on Mars?

A new study suggests that dark markings on the planet Mars represent sand not water. Research in 2015 had suggested that lines on some Martian hills were evidence of water. Yet American scientists now say these lines appear more like dry, steep flows

发表于:2019-01-02 / 阅读(272) / 评论(0)

2017年VOA慢速英语(十二)月

EXPLORATIONS - The Indiana Dunes: Beautiful Sand Hills and W

EXPLORATIONS - The Indiana Dunes: Beautiful Sand Hills and Wildlife in America's Midwest By Jerilyn Watson Broadcast: Wednesday, April 27, 2005 (MUSIC) VOICE ONE: This is Faith Lapidus. VOICE TWO: And

发表于:2019-01-04 / 阅读(65) / 评论(0)

Explorations

2007年VOA标准英语-US Coast Runs Short on Sand Even as Beaches Ero

By Steve Mort Fort Lauderdale, Florida 13 September 2007 Parts of the United States are facing a shortage of sand, and officials are working on innovative ways to fix the problem. In Florida, experts say beach erosion caused by a rising sea level and

发表于:2019-01-06 / 阅读(74) / 评论(0)

2007年VOA标准英语（九月）

VOA慢速英语2012 EXPLORATIONS - The Indiana Dunes: Ancient Hills of Sand on Lake Michigan

EXPLORATIONS - The Indiana Dunes: Ancient Hills of Sand on Lake Michigan FAITH LAPIDUS: This is Faith Lapidus. STEVE EMBER: And this is Steve Ember with the VOA Special English program EXPLORATIONS. Today we visit the Indiana Dunes. These hills of sa

发表于:2019-01-12 / 阅读(50) / 评论(0)

2012年VOA慢速英语(六)月

美国国家公共电台 NPR PHOTOS: The Creamy, Sculpted Dunes Of White Sands National Monument

LOURDES GARCIA-NAVARRO, HOST: White Sands National Monument in southern New Mexico is a huge expanse of pure, white sand dunes that form a shifting, spectacular landscape. Here's NPR's Melissa Block with the latest in her series Our Land on a place l

发表于:2019-01-17 / 阅读(40) / 评论(0)

2017年NPR美国国家公共电台4月

全球变暖威胁古巴的顶级海滩度假胜地

全球变暖威胁古巴的顶级海滩度假胜地 HAVANA, Dec. 23 (Xinhua) -- Cuba's famed beach resort of Varadero is facing severe coastline erosion due to rising sea level caused by global warming, the Cuban News Agency (ACN) reported Monday. Th

发表于:2019-02-18 / 阅读(30) / 评论(0)

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acoustical oceanography

allochthonous coal

antlermicin

assessment and decision of system

Boolean recurrence function

bowsprits