单词：paleobiology of invertebrates
单词：paleobiology of invertebrates 相关文章
The preservation of embryos and juveniles is a rate occurrence in the fossil record. The tiny, delicate skeletons are usually scattered by scavengers or destroyed by weathering before they can be foss
新东方背诵文选
Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are most efficient only withi
新东方背诵文选
Organisms evolved sexual reproduction so they could stay one step ahead of parasites. Or so the theory goes. But what about beasties that make babies without sex? How do they escape infection? A study in the journal Science suggests that for bdelloid
Scientific American(一)月
Great Barrier Reef Choking on Pollutants 大堡礁遭遇前所未有的污染 Attempts to protect the Great Barrier Reef are failing. A report released Monday by the government in Australia says water quality in the Great Barrier Reef is far below wh
2015年VOA慢速英语(十)月
This is Scientific American - 60 second Science. I'm Christopher Antaryata. Got a minute? We humans take medicine when we are sick. As due our primate cousins, chimps, for example, snack on a bitter African shrub to combat intestinal worms. But the h
2015年Scientific American(八)月
Transcript (by myconsent, for reference only) Scientists on Thursday released results of a landmark study to record the diversity of life in and around Australia s reefs. The scientists from the Census of Marine Life have reported finding hundreds o
国家地理2008年
Here in the Timor Sea off northern Australia, take a look at a creature that seems to have the soul of a riverboat gambler. It moves through turf dominated by large hungry predators, and it fights these predators in a way that will astound you. This
国家地理2007年
For several years something mysterious has been plaguing sea otter populations off the coast of California. The animal may have seizure s, it may shake, it may act like it's weak, uh, it may not seem like it's very aware of its surroundings, and it m
国家地理2007年
平时，贪吃的朋友们总是觉得多吃一点没有关系，满足自己的嘴馋最要紧。然而，你们知道吗？贪吃、吃得过多有可能会导致死亡。所以，大家还是要合理饮食。 Yael: Hey Don, do you know why over-eating can be lethal for a squid? Don: Obese squid are prone to heart
国外媒体新闻
Soon we will be in a position to go forth in the field with sequencers on our backs to hunt bacteria in tiny crevices of the habitat's surface, 不久的将来，我们还将可以通过便携式的测序机完成这样的操作,直接寻找到那些隐
TED演讲科学篇
英语短文：Cells and Temperature Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are most efficient only within a narrow ra
英语小短文
Popular Weed Killer Stirs Health, Environmental Concerns Jamie Jamison produces corn, wheat and soybeans on his 500-hectare farm. To boost production, he uses genetically modified seeds. To control weeds, he uses Atrazine. It gives us good long-seaso
VOA标准英语2012年(五月)
If insects suddenly morphed into large beings, and decided to wage war on us, there's no doubt that humans would lose. 如果有一天，所有的昆虫突然都变大了并且要和我们开战，那我们人类必输无疑。 We'd simply be crushed
TED演讲教育篇
When we lose reefs, we lose basically the cradles of evolution in the oceans. Wolfgang Kiessling A new study out this week highlights the role that coral reefs play in evolution, adding another reason to preserve these delicate, diverse, and often be
VOA标准英语2010年(一月)
Sharks aren't typically thought of as vegetarians. Or even omnivores. But about 10 years ago, scientists documented a dainty relative of the hammerhead shark, known as a bonnethead shark, consuming copious amounts of seagrass. 锤头鲨通常不被认为
2018年科学美国人10月
The graduation photo of An Yongrui, a paleobiology major at Peking University, has become an internet sensation after he recently posted it online. 近日，北京大学古生物学专业毕业生安永睿在将自己的毕业照发布到网上之后，
英语新闻
Cells and Temperature Cells cannot remain alive outside certain limits of temperature, and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are most efficient only within a narrow range around 37 ℃
双语有声阅读
BBC News with Marion Marshall The internationally recognised winner of the presidential election in Ivory Coast, Alassane Ouattara, has called on the West African regional grouping Ecowas to send in special forces to remove his rival Laurent Gbagbo f
英语听力精选进阶版
The polar oceans are not biological deserts after all. A marine census released recently documented 7,500 species living in the Antarctic and 5,500 in the Arctic, including several hundred that researchers believe could be new to science. Most of the
英语时差8，16
According to the Wall Street Journal, the world has about 10,000 active taxonomists, 据《华尔街日报》说，世界上大约有l万名活跃的分类学家， not a great number when you consider how much there is to be recorded. 考虑到有那么
万物简史