标签：金属 相关文章
New Tool Maps Buildings' Energy Efficiency 新工具提高建筑物的能源效率 Architects, engineers and building managers will soon be able to quickly collect data about building interiors that once took weeks to measure and process. A backpack-
VOA标准英语2015年(二月)
Scrap-Metal Separation May Become Cheaper 新技术降低废金属分离成本 According to the Environmental Protection Agency, the United States throws 14.8 million tons of scrap metal into landfills every year. One of the main reasons is the diffi
VOA标准英语2015年(二月)
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
初学者听力文摘精选
Rachel: This tastes funny. Sergey: Its fine. Theres nothing wrong with it. Rachel: It tastes like its tainted or something. Dont you detect a funny metallic taste? Sergey: No, its perfectly fine. Just eat it. Rachel: I swear theres something off abou
地道美语播客
At first glance, dust storms do not seem very fascinating. Winds pick up fine particles from the ground, and then the air becomes thick with dust. What is interesting, though, is that dust storms can travel across the ocean, sometimes from continent
双语有声阅读
Mercury Fillings Seem Safer over Time A study in the journal Chemical Research in Toxicology finds that mercury on the surface of dental fillings slowly turns to an inert sulfide compound, which should keep the mercury from harming the nervous system
60秒科学
New York Residential Building Tops in Height, Price Americas most famous skyline has a new architectural icon - New York by Gehry. This gleaming 76-floor residential skyscraper is dramatic. So is the cost to live there. A penthouse costs $65,000 a mo
VOA标准英语2012年(四月)
This could be the most terrifying sight in the solar system: clear skies above a bottomless pit, an infernal drop into the depth of Jupiters endless sky. You may have raindrops evaporating into the hot interiors of Jupiter, but there is no ocean down
自然百科2012年
Metallica Lang Lang One 二十世纪八十年代后期，欧美摇滚乐坛上重金属音乐正在鼎盛时期，而此时出现的Thrash Metal（激流金属）象一股洪流一样冲击着乐坛。这种流派的创始者就是1981年在美国洛杉
舞曲狂欢
Researchers: New Nanoparticles May Replace Chemicals in Pesticides 研究人员表示新的纳米粒子可能取代化学农药 Using pesticides to battle harmful bacteria that attack fruit and vegetables has its downside, releasing harmful chemicals
VOA标准英语2015年(八月)
This show is centered on an in-depth report that concerns child labor, a large African country and the element of cobalt. We're explaining how all those things are tied together. First, the issue of child labor. The United Nations defines this as wor
CNN美国有线新闻2018年7月
This vast secret ocean of seething metallic hydrogen, not a molten iron core, is the power house generating Jupiters dangerous energy shroud. But there is one more mystery hidden inside this giant alien onion, the key to the origin of the planets the
自然百科2012年
Thermometers just tell you the temperature. Thermostats need to do more than that. In addition to reading the air temperature, thermostats also turn your furnace on if the air gets too cool, and turn it off again when the air heats up. How do they do
英语听力文摘 English Digest
介绍: Police: Please lay your bags flat on the conveyor /k?n?ve?.? / belt, and use the bins for small objects. 请把你的包平放在传送带上，小件物品放在箱子里。 Dan: Do I need to take my laptop out of the bag? 笔记本电脑要拿
英语俚语天天说
Valor will be tackling the acid clouds of Venus with little help from flying pan technology. This being two weather balloons are we watched Venus in the mid-1980s. This with wagon machines there were two sep balloons that the Russians put them in the
自然百科2012年
You never guess the dangers on the ground from orbit, except maybe for this, massive, double-barreled storms hovering above the poles. Of this, what we called dipole features trailing around, we don't know what, really what they are, but the whole fe
自然百科2012年
I swiftly hoisted myself to the summit of this half-submerged creature or object that was serving as our refuge. 我很快爬到这个半浸在水中，已经作了我们的临时避难所的生物上面。 I tested it with my foot. Obviously it was
《海底两万里》中英双语有声读物
Treasurer Joe Hockey is warning that next month's budget will include spending cuts, tougher means test and up-front(预付的） payments for government services. Mr. Hockey used a speech in Sydney last night to review some of the details from a com
澳洲ABC新闻快递2014年
The Cleaning Power of Soft Drinks! 饮料的神奇清洁能力 Lets begin with a cleaning tip: If you have some tarnished or corroded brass that you want to clean, an old brass candlestick for example, you can use Coca-Cola, or any other cola soft dr
英语听力文摘 English Digest
Vesta 灶神星 You can see the planet Jupiter on a clear night, but Jupiter is humongous. Mars and Mercury are smaller than that, and you can see them, too. Wait a minute, our moon is even smaller, and you can see that. Could anything smaller than t
英语听力文摘 English Digest