标签：extinction 相关文章
Passage Two 14. A) The Asian elephant is easier to tame. B) The Asian elephant's skin is more valuable. C) The Asian elephant is less popular with tourists. D) The Asian elephant produces ivory of a b
【CET 12-24备战】六级听力
Koalas are considered an Australian national icon. These adorable tree-hugging animals feed on eucalyptus tree leaves. The problem is on average a koala destroys 13 pounds of the leaves to eat 2 pound
赖世雄中级美国英语
Reeling in Illicit Fishing Its estimated that illicit fishing accounts for up 26 million tons of seafood a year and costs the global economy as much as 26 billion dollars annually. An international agreement to help curb the problem is gaining suppor
VOA标准英语2015年(八月)
夏威夷濒危鸟类获得二次机会 Of the world's nearly 9,900 bird species, 13 percent - one in eight - are threatened with extinction, according to BirdLife International. Among them are two Hawaiian honeycreepers - tiny birds that live in the
VOA双语新闻 2015年4月
An international tiger conservation workshop is underway in Yunnan's capital, Kunming. Topics for discussion include the protection of wild tigers and combating the illegal trade in animal products. Shi Kun is the director of the wildlife institute a
世界各地新闻集锦
It was the largest of the five major mass extinctions in earth's history, well before the dinosaur killer 66 million years ago. What's called the end Permian extinction 252 million years ago, wiped out 96% of aquatic species and 70% of species on lan
2014年Scientific American(二)月
In a more agnostic culture than the one I grew up with it's a challenge to know how to talk meaningfully about something so enormous when we don't really understand it. There is scepticism about the afterlife these days. But however sceptical people
智慧人生篇章
When the Pachyrhinosaurus bodies came to the bend in the river the momentum of the water push their carcasses to the outer edge of the bend. 当肿鼻角龙的尸体来到河流的转弯处，水流的动力将它们的尸体冲向河流转弯处外缘
侏罗纪搏击俱乐部
The thing about extinction events is that, of course they're very bad for the animals that go extinct, but they open up a door of opportunity for a lot of other animals and plants. 其实就灭绝事件来说，当然对走向灭绝的动物来说很糟
侏罗纪搏击俱乐部
ConservationistsTryingtoSave,ReproduceEndangeredFrogs Forty percent of all the frogs in the world are in danger of extinction, according to the Smithsonian Institution. Pollution, pesticides, climate change and now a fungus are taking a toll on this
VOA标准英语2011年(九月)
濒危动物重新野放回归自然可能引发不良后果 Wild horses, oxen and reindeer are returning to Seberia for the first time in 10000 years. 这是10000年来野马、野牛及驯鹿首次回到西伯利亚。 Their new home is Pleistocene
VOA标准英语2016年(三月)
Researchers working for the World Wildlife Fund have warned that the effects of climate change pose a serious threat to rare species of wildlife discovered within the past year in Southeast Asia, including a fanged frog and a leopard-striped gecko. A
自然百科2009年
KELLY MCEVERS, HOST: Living by the ocean might sound nice. In the time of climate change, it can be risky. As sea levels rise, people who live near the coast have tough choices - try to fortify their homes, move to higher ground or just leave. Sam Ev
2017年NPR美国国家公共电台2月
Unfortunately for the therapsids, their cousins the diapsids were also productively evolving, 兽孔目爬行动物的运气不佳，它们的表亲双孔亚纲在进化过程中也繁殖力很强， in their case into dinosaurs (among other things),
万物简史
A major step toward reducing elephant poaching has been made in China, with a new ban on ivory trading coming into effect. Under the new regulations, its now set to become illegal to process or sell ivory or ivory products in China. CRI's Guan Chao h
2017CRI中国国际广播电台
Scientists have uncovered the world's largest snake. A study published in Thursdays edition of the science journal Nature reveals the discovery in Colombia. Measuring about 45-feet long and weighing more than a ton, the so-called Titanoboa would have
自然百科2009年
I have always loved frogs. They are just some of the most amazing creatures on earth. Theyve been around for 250 million years. They actually survived the dinosaurs. They come in just about every color, shape and size. But they are disappearing. Im A
自然百科2009年
The return of the wolf will always be controversial. But evidence is now emerging that wolves are far more important than anyone imagined, especially back in the heart of Yellowstone. It's nearly the end of October. The cold autumn nights have brough
自然百科2012年
The number of people buying books across China is steadily declining, which has led to more closures of traditional brick and mortar bookstores. But one independent bookstore in Tianjin has not only survived over the past 15 years, its actually seein
CCTV9英语新闻2014年04月
For complex organisms, the average lifespan of a species is only about four million yearsroughly about where we are now. 对于复杂动物来说，一个物种的平均寿命只有大约400万年大致相当于我们人类迄今存在的时间。 Ex
万物简史