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The scientist confirmed the snake was a previously unknown species after conducting a genetic analysis of tissue samples.
出自-2017年6月听力原文
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A new species of snake has been discovered on a remote island in the Bahamas.
出自-2017年6月听力原文
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The microwave and fast-food chains were the biggest catalysts ( ' , 催化剂 ), but the big food companies—which want to sell anything except the raw ingredients that go into cooking—made the home cook an endangered species.
出自-2015年12月阅读原文
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Human beings are a species of mammals (哺乳动物).
出自-2010年12月阅读原文
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Learn five species of bird, five butterflies, five trees, five bird songs
出自-2010年12月阅读原文
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Commenting on the find, snake expert Robert Henderson, from the milwaukee Museum of Natural history, said: "Worldwide new species of frogs are being discovered and described quite regularly."
2017年6月四级真题（第二套）听力 Section A
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New species of snakes, however, are much rarer.
2017年6月四级真题（第二套）听力 Section A
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The International Union for Conservation of Nature had previously considered the area a "possible range" for the species, and local people had reported seeing lions in the area, but no one presented convincing evidence.
2017年12月四级真题（第二套）听力 Section A
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The microwave and fast-food chains were the biggest catalysts, but the big food companies—which want to sell anything except the raw ingredients that go into cooking—made the home cook an endangered species.
2015年12月四级真题（第三套）阅读 Section B
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We will lose a vital part of what has made humanity as a whole so successful as a species.
2017年12月四级真题（第二套）阅读 Section B
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The genetic change in the stork species.
出自-2017年6月阅读原文
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The more evidence we collect that our species is capable of greatness, the more we will actually achieve it.
出自-2013年12月阅读原文
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This nameless person pushed the human race over a historic threshold, for it was in that year that mankind became, for the first time in its history, a predominantly urban species.
出自-2013年6月阅读原文
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This exploitation has reached such extremes that presently it appears that some hundreds of thousands of species will be extinguished before the end of the century.
出自-2013年12月听力原文
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As such, they are key species for understanding and predicting impacts of global change on Antarctic and sub-Antarctic marine ecosystems.
2019年12月六级真题（第三套）阅读 Section C
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Co-author Céline Le Bohec, from the University of Strasbourg in France, warned: "If there're no actions aimed at haling or controlling global warming, and the pace of the current human- induced changes such as climate change and overfishing stays the same
2019年12月六级真题（第三套）阅读 Section C
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Farrant and others in the resurrection business got together last year to discuss the best species of resurrection plant to use as a lab model.
2018年6月六级真题（第一套）阅读 Section B
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Flamingos, however, are the only species that actually makes life in the midst of all that death.
2017年12月六级真题（第三套）阅读 Section C
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It is home to one of the world's finest marine ecosystems,with more than 1,300 species of fish and 700 species of coral.
2017年12月六级真题（第二套）阅读 Section A
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It is the means to intervene more wisely, and more effectively in the real world, to improve the well-being, not only of yourself—important as that may be—but of people around you and of other species with whom we share the planet.
2017年6月六级真题（第二套）听力 Section C
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It's not only the study of human population, but the populations of non-human species, including viruses like influenza, the bacteria in your gut, plants that you eat, animals that you enjoy or that provide you with meat.
2017年6月六级真题（第二套）听力 Section C
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It's the fastest-ever recovery of a mammal, joining peers like the Louisiana black bear as glowing successes in the history of the Endangered Species Act.
2018年12月六级真题（第三套）阅读 Section A
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Just like medical researchers use rats to test ideas for human medical treatments, botanists use plants that are relatively easy to grow in a lab or greenhouse setting to test their ideas for related species.
2018年6月六级真题（第一套）阅读 Section B
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Our species originated around 200,000 years ago and underwent tremendous diversification culturally, technologically, linguistically, artistically for 130,000 years.
2019年6月六级真题（第一套）听力 Section C
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Professor Stephen Hawking has warned that the creation of powerful artificial intelligence A will be "either the best, or the worst thing, ever to happen to humanity", and praised the creation of an academic institute dedicated to researching the future o
2019年6月六级真题（第一套）阅读 Section C
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Some animal 32 species also display this phenomenon.
2017年6月六级真题（第三套）阅读 Section A
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That's because, for the first time in human history, a large proportion of the- species is in continuous contact with technology that can record key features of an individual's behavior and environment.
2018年12月六级真题（第一套）阅读 Section C
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The bird Clark's nutcracker, for example, hides up to 100, 000 seeds per year, up to 30 kilometers away from the seed source, and has a very close symbiotic(共生的) relationship with several pine species, most 32 notably the whitebark pine.
2016年12月六级真题（第一套）阅读 Section A
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The Nature Conservancy has declared war on a multitude of invasive species here, from sheep to plants to the aggressive Argentine ant.
2018年12月六级真题（第三套）阅读 Section A
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These include the centuries-old custom of "bul", where leaders would call a temporary stop to fishing for key species in order to give fish stocks an opportunity to replenish.
2017年12月六级真题（第二套）阅读 Section A
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They can recover from months and years without water, depending on the species.
2018年6月六级真题（第一套）阅读 Section B
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Three species of tilapia(罗非鱼) thrive there part-time.
2017年12月六级真题（第三套）阅读 Section C
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Today, federal agencies are pulling the island fox from the Endangered Species list.
2018年12月六级真题（第三套）阅读 Section A