单词：Pt-Rh alloys
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What Makes White Gold White? Many people associate the metal gold with the color gold. But, some gold jewelry is not golden at all: its white. 图片1 Golden Color Gold is one of the heaviest and softest metals. Pure gold, called 24-carat gold, is so
英语听力文摘 English Digest
J ack splashed into the blue sunlit sea. He sank tothe bottom and then bobbed back up. He coughed andpushed his hair out of his eyes. Annie was treading water nearby. Hey! she called. Hey! Jack sputtered. I was wrong! You were right! Annie said. Shes
汪培珽儿童英文分级书单《神奇树屋》
rhiannon rings like a bell thru the night and wouldn't you love to love her? she rules her life like a bird in flight and who will be her lover? all your life you've never seen a woman - taken by the wind would you stay if she promised you heaven? wi
好听的英文歌曲
rhiannon rings like a bell thru the night and wouldn't you love to love her? she rules her life like a bird in flight and who will be her lover? all your life you've never seen a woman - taken by the wind would you stay if she promised you heaven? wi
美国偶像 American Idol
'Metal Muscles' Flex a New Bionic Hand 德国科学家发明新的仿生手 Artificial limbs, including the most complex of them the human hand are getting more life-like and useful due to constant advances in tiny hydraulic, pneumatic and electric m
VOA标准英语2015年(七月)
Many people associate the metal gold with the color gold. But, some gold jewelry is not golden at all: its white. 很多人都认为金子就应该是金色。但一些黄金首饰的颜色并不是金色，而是白色。 Golden Color 金色 Gold is
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That budget now stands at $5,400 million a yeara staggering sum, though somewhat less than we pay for cigarettes and cigars every year. Space expenditures will soon rise some more, from 40 cents per person per week to more than 50 cents a week for ev
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What Makes White Gold White? Many people associate the metal gold with the color gold. But, some gold jewelry is not golden at all: its white. Golden Color Gold is one of the heaviest and softest metals. Pure gold, called 24-carat gold, is so soft th
英语听力文摘 English Digest
Copper Metal Kills Viruses on Contact 铜能杀死细菌和病毒 Even in the world of medicine, what is old is new again. 医药界也刮起了复古风。 Thousands of years ago, Egyptians used it to sterilize drinking water. Ancient Romans, Aztecs
2016年VOA慢速英语(二)月
Various stages of cartilage growth on scaffold. The final image on the right shows naturally forming cartilage for comparison. These replacement joints can be made of combinations of metal alloys, plastic and ceramic, but new research shows that it m
VOA标准英语2010年(八)月
Somalia's '11 Brothers' Sing Refugee Rhythm and Blues A group of Somali friends who have fled their country have reassembled as a rhythm and blues and hip-hop band in South Africa. But even in their new country, where they are living as refugees, the
VOA标准英语2011年(七月)
经典歌曲-莱因石牛仔RHINESTONE COWBOY--GLEN i've been walking these streets so long singing the same old song i know every crack in these dirty sidewalks of broadway where hustle's the name of game and nice guys get washed away like the snow
经典英文歌曲
By Joseph Mok Providence, Rhode Island 05 December 2006 watch Waterfire report Ablaze on the rivers from March to October each year, WaterFire Providence in the capital city of the northeastern state of Rhode Island is cited as the most popular work
2006年VOA标准英语（十二月）
By Kurt Achin Seoul 02 April 2008 South Korean officials have issued their first formal response to recent moves by North Korea, labeling some of the North's recent statements inappropriate. The exchange comes as high-level American and South Korean
VOA常速英语2008年（四月）
Congratulations, you've arrived on the hottest surface in the solar system. Here, the official temperature is eight hundred seventy degrees Fahrenheit. Day or night, equator or pole, the searing heat never varies more than a few degrees, and thats wh
自然百科2012年
Nitinol Nitinol is one of the most extraordinary metals to be discovered this century: A simple alloy of nickel and titanium, nitinol has some perplexing properties. A metal with a memory, it can be made to remember any shape into which it is fashion
双语有声阅读
ArcelorMittal will launch a new high-strength automotive steel later this year, throwing down the gauntlet to its rivals in the race to make cars lighter. 安赛乐米塔尔(ArcelorMittal)将于今年晚些时候发布一款新型高强度汽车用钢，
英语新闻
By Steve Herman Bangargh, India 09 October 2009 India, with its rich and long history, is full of mysteries. Perhaps none is as puzzling as what happened hundreds of years ago at a royal city in Rajasthan, now under excavation. Where is everyone? Bh
VOA标准英语2009年(十月)
Calculationsofthedensityofalloys basedonBernal-typemodelsofthe alloysmetalcomponentagreedfairly wellwiththeexperimentallydetermined valuesfrommeasurementsonalloys (55)consistingofanoblemetaltogether wi
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