标签：Earth Day 相关文章
Paris Conference to Discuss Climate Change, Rising Oceans Some of the world's leading experts on oceans and climate change are meeting in Paris this week to discuss why oceans are rising, and where to channel scarce research funds to study the pheno
(科普英语)Earth and Sky
Salty Origins for Early Earth Biomolecules In a study presented at the European Planetary Science Conference in Potsdam, researchers proposed that salt deposits on the early Earth's volcanic coasts enabled the conversion of amino acids into other im
60秒科学
Earth's Surfaces Are Always Moving 地球表面一直在运动 From VOA Learning English, this is Science in the News. Im Anna Matteo. And Im Christopher Cruise. Scientists who study the Earth tell us the continents and ocean floors are always moving
2014年VOA慢速英语(四)月
Earth Summit Strives for Energy for All Nearly two billion people, about one-third of the worlds population, don't have access to energy, according to the United Nations. At a preview of the summit, at the non-profit Center for Global Development in
VOA标准英语2012年(五月)
During its magnetic cycle, the Sun undergoes periodic changes in activity. Every 11 years, it enters solar maximum. This 11 years cycle of solar activity has peaks where theres lots of solar storms. And right now where the sun is taking a little napp
自然百科2011年
Six years later, they come to believe these light flashes are the results of high energy, heavy cosmic rays penetrating the spacecraft and the crew members' eyes. These/ protons or electrons, just very, very high energy, ripped / part of atoms, sprin
自然百科2011年
If we could flip a switch and just turn off the Earth's magnetic field, it will take about 15,000 years to disappear, based on the rate of decay of the field that we've seen over the last 150 years. It's currently decaying at a rate that would see an
自然百科2011年
Easily confused by this idea, there has a big thawed iron inner core, so that I think it's just the bar magnet, just permanent magnet frozen in nad, and that's where causes all the magnetic field. But it's too hot inside the Earth, that can't happen
自然百科2011年
As the vast sphere reaches / maximum speed, something incredible happens. Huge lines of magnetism arc in and out of the model core. Well, we can't see the magnetic field coming out of the experiment, we can measure them, we can put many different mag
自然百科2011年
Larry Newitt from the Geological Survey of Canada charts the movement of the magnetic North Pole as it wanders the icy reaches of northern Canada. To determine where the magnetic pole / is, we can't rely on one single observation. What I try to do is
自然百科2011年
来自加拿大(安大略省)的女声二重唱组合DALA， 由Sheila Carabine和 Amanda Walther组成，2005年夏天，组合签约加拿大环球唱片，并发行了首张专集《Angels and Thieves》。 歌词： I've been trying to paint a ma
金属
Pianist David Benoit is basking in the warmth of his first recording of original material in four years, Earthglow. David modeled his album after a blend of instrumental jazz he calls jazz-lounge-Euro-chill. Benoit was interested in trying something
VOA标准英语2010年(四)月
China is the world's largest producer and exporter of rare-earths. These are elements which are critical to the manufacturing of high-tech products, including smartphones, wind turbines and car batteries, among other things. However, the rare-earth i
2016CRI中国国际广播电台