标签：predators 相关文章
Ceratosaurus, although a pretty nasty predator, was not really suited for taking on adult size Stegosaurus or those long-necked sauropods found at the site. 角鼻龙，虽然是很凶残的掠食者，但肯定不适合攻击在石场发现的成年剑
侏罗纪搏击俱乐部
Allosaurus was really the first of the truly big meat-eating dinosaurs that was found and was the one from fairly complete remains. 异特龙真的是被发现的第一种大型肉食恐龙而且其骨骼保存相当完整。 It was the Tyrannosaurus
侏罗纪搏击俱乐部
During times of drought, animals are stressed to the limit. 在干旱时期，动物们的压力已至极限。 Normal behavior is basically thrown out the window and it becomes a no holds bar fight for survival. 通常的行为都已不再适用，这
侏罗纪搏击俱乐部
Their teeth were recurved which means they start to point backwards and they were also very blade-like and had serrated edges. 它们的牙齿后弯曲，这意味着它们开始指向后方，它们也是很像利刃边缘呈锯齿状。 Three tons
侏罗纪搏击俱乐部
Since the discovery of the La Brea pits, paleontologists have removed and catalogued over 1 million bones representing over 230 different species of animals. 从发现拉布雷亚沥青坑以来，古生物学家已经移出并编目了超过一百万个
侏罗纪搏击俱乐部
A forest of umbrella thorn acacia trees in northern Tanzania provides shelter and sustenance for a wealth of animals. In this crowded paradise, property is hotly contested at all levels. Male impala , eager to challenge for a territory, build up stre
国家地理2007年
On the southern edge of Ngorongoro Swamp, the lake cats have a new opportunity to make a big kill. Buffalo have poor vision. They are only 30 meters away, but in the dim morning light, they can't see the pride. While they don't see very well, buffalo
国家地理2007年
华尔街日报:由于中国年轻人环保意识的增强,以及中国政府的反腐措施,这几年中国鱼翅消费迅速下降. 中国鱼翅消费大幅下降 The Wall Street Journal: China's consumption of shark fin soup is declining rapidly a
双语趣听精彩世界
Plant Signals 植物的语言 Can plants smell and taste in the same way that animals do? Can they talk to each other and to insects? Learn how scientists hope to unravel some of the mysteries of plant senses -- on today's Earth and Sky. JB: This is Eart
(科普英语)Earth and Sky
Living underground, mole rats are sheltered from the Kalahari's worst extremes of temperature. We think of deserts as hot places. But nightly temperatures can fall well below zero. At dawn, meerkat s
浩瀚沙漠
Humans have shaped the evolution of animals for as long as we have been catching and eating them. In the days of spear hunting, speed and boldness were survival assets. But with today's high-powered rifles, the tables have turned. Animals that speed
Scientific American(九)月
AS IT IS 2015-01-13 Glass Buildings Are Deadly for Birds in the City 城市里的玻璃建筑是鸟儿的致命杀手 Millions of birds are killed each year in cities when they strike illuminated buildings, especially ones covered with a lot of glass
2015年VOA慢速英语(一)月
KELLY MCEVERS, HOST: Hell's Kitchen has for a long time been pop culture shorthand for gritty New York City. (SOUNDBITE OF TV SHOW, JESSICA JONES) KRYSTEN RITTER: (As Jessica Jones) Do you know any drug dealers? MIKE COLTER: (As Luke Cage) I own a ba
2017年NPR美国国家公共电台8月
Now out of the clear blue seas off the islands of Polynesia where scientists have discovered an area teeming with sharks, normally there is a naturally balance with lots of prey and fewer predators, but not so in this case. Our science reporter Jonat
中英双语新闻
BBC news with David Austin. Scientists at an international climate conference in Morocco say this year is set to be the hottest on record. Delegates concerned about the possible effect of Donald Trump presidency on the landmark Paris Climate agreemen
中英双语新闻
It may not be the most melodious bit of birdsong youll ever encounter. [Titmouse alarm call]. But this particular call, issued by a tufted titmouse, conveys important information about the presence of potential predators. But only if other birds can
2016年Scientific American(八)月
All of this food makes the mangrove a great place for fish. Small residents as well as youngsters that will one day move out to the barrier reef. Reef species like these rabbit fish may look big, but they are still only 1/3 of their adult size. These
自然百科2014年
It cuts branches into more manageable lengths and then swims them down a network of purpose-built canals towards the dam. The pond to give this beaver protection from predators, and the canals allow it to forage far into the forest, carrying many tim
自然百科2012年
Soon there may be violence as males joust to win female affections. But for now, everyone enjoys a touching reunion. The calf, out of his depth among these goliaths, returns to the mentoring eye of his mother. He may not leave her for another 10 year
自然百科2010年
Todd: James, I saw on your desk you have a nice picture of a dog. James: Yes. Todd: OK. Tell us about your dog. James: My dog's name is Piper. He was a mutt, a homeless dog that we picked up off the street about four and a half years ago. Todd: Oh, w
英语趣味课堂