标签：endangered 相关文章
By Paul Sisco Washington, D.C. 29 June 2007 The American bald eagle, a national symbol since 1782, was once almost wiped out by hunters and pesticide poisoning. Today the great bird is not only surviving but thriving. Four decades after it was decla
2007年VOA标准英语（六月）
By Deborah Block Washington, D.C. 20 June 2007 The National Trust for Historic Preservation in Washington, D.C. works to protect historic sites in the United States. Each year the private group identifies America's most endangered places. This year t
2007年VOA标准英语（六月）
By Zulima Palacio Kauai, Hawaii 18 June 2007 The Hawaiian archipelago represents the most isolated group of islands in the world. Plants and animals that are common to many people elsewhere only made it to these islands in the last few hundred years
2007年VOA标准英语（六月）
Pangolins Are Most Trafficked Mammal 穿山甲因被贩卖已成世界上最濒危的哺乳动物 Have you ever heard of a pangolin? A lot of people havent. Its also known as a scaly anteater. Conservation groups say its the worlds most illegally tra
VOA标准英语2015年(七月)
Project to Save Endangered Orchids Blossoms in Florida 佛罗里达开始拯救濒危兰花花种的计划 Many gardeners around the world consider orchids among the most beautiful flowering plants. There are more than 20,000 species of orchids, and
VOA标准英语2014年(五月)
By Jessica Berman Washington 10 April 2008 An international team of scientists has conducted an exhaustive survey of Madagascar's thousands of endangered plant and animal species. The information will be used to protect the creatures and vegetation t
VOA常速英语2008年（四月）
Coextinction 绝种是指生物群体逐渐消失的过程。物种和较大族群常态性的灭绝，并由更进步的形式所取代，这是进化的正常过程。然而，从化石的记录来看，有时会出现整个科目的动物和植物都
英语听力文摘 English Digest