单词：schiff base polymer
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A new biography by Pulitzer Prize-winning author Stacy Schiff tackles the life, death and legacy of Cleopatra. Schiff's work challenges some of the assumptions long held about Egypt's last queen. It has been said that history is written by the victor
VOA标准英语2010年(十一)月
华盛顿审视飞航安全 避免俄客机惨剧 Washington is renewing its focus on international aviation security as evidence increasingly points to the possibility that a bomb destroyed a Russian passenger airliner over Egypt's Sinai Peninsula,
VOA双语新闻 2015年11月
This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Are your car bumpers riddled with scars from encounters with tight parking spaces? Did the furniture movers scratch your floor? Wouldn't it be great if t
Scientific American(四)月
This is Scientific American's 60-Second Science. Im Cynthia Graber. This will just take a minute. Buildings consume about a third of the energy and two-thirds of the electricity in the U.S. Roofs are a good place to try to cut those figures. Because
Scientific American(三)月
Most of us blink without thinking. But people whove sustained strokes or combat injuries can lose their ability to blink. Which is important for lubricating and cleaning the eye. Surgery is an optiona small piece of muscle transplanted from the leg c
Scientific American(一)月
The One With Ross抯 Step Forward [Scene: Central Perk. Rachel and Phoebe are there.] Rachel: Phoebe. Phoebe: Yeah? Rachel: Look at that guy by the window. Wow! Phoebe: He抯 awfully short and I think
六人行—第6-10季
Lowering the Ceiling on Roof Energy Losses Buildings consume about a third of the energy and two-thirds of the electricity in the U.S. Roofs are a good place to try to cut those figures. Because traditional black asphalt roofs heat up in summer and s
60秒科学
This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute?. [Spray sound.] Killing bugs? No. [Spray sound.] Deodorizing the bathroom? No. [Spray sound.] Checking for explosives, yes. Because chemists at the University of Califor
Scientific American(九)月
Patients undergoing coronary bypass surgery need implants of new, healthy blood vessels. So do those who receive repeated hemodialysis due to kidney failure. The best option is to use the patient's own veins or arteries, but thousands of patients don
Scientific American(二)月
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Solar cells convert sunlight to electricity. But they don't take advantage of all that solar heat, thereby missing out on the majority of the solar ene
Scientific American(四)月
CHRISTOPHER CRUISE: Im Christopher Cruise. FAITH LAPIDUS: And Im Faith Lapidus with EXPLORATIONS in VOA Special English. Today we tell about the life of one of the most famous and powerful women in history. She was a goddess, a queen, and a skilled d
2011年VOA慢速英语(二)月
Research Breakthrough for Biodegradable Tires? 研究人员研发完全可降解轮胎 Researchers say they have created a new synthetic rubber that could be used to make biodegradable tires. A team at Texas AM Universitys campus in the Gulf nation o
2016年VOA慢速英语(九)月
Climate, Brain Infection Linked in Uganda Scientists say they have found the first major neurological condition linked to climate. A Ugandan study shows the amount of rainfall can affect the number of infants who develop a deadly brain infection. Its
VOA标准英语2013年(一月)
'Smart' Bandages Could Heal Wounds More Quickly 智能绷带有助更快治愈伤口 Simple bandages are usually seen as the first line of attack in healing small to moderate wounds and burns. But scientists say new synthetic materials with embedded
VOA标准英语2016年(二月)
RACHEL MARTIN, HOST: There are more than 130 vacancies on the U.S. federal courts. And now, President Trump has started to fill some of those jobs. The number is unusually large because in the last years of the Obama administration, Republicans block
2017年NPR美国国家公共电台6月
Im Christopher Cruise. And Im Faith Lapidus with EXPLORATIONS in VOA Special English. Today we tell about the life of one of the most famous and powerful women in history. She was a goddess, a queen, and a skilled diplomat and negotiator. She was a g
英语语言学习
地点：医院检查室 人物：希夫医生，瑞秋 事件：瑞秋产检，和检查大夫进行了一段有趣的对话。 Dr. Schiff: Hi Rachel? I'm Dr. Schiff. So, how's it going? 希夫医生：嗨，是瑞秋吗？我是希夫医生。你感觉
英语PK台
JUDY WOODRUFF: And we turn now to the ranking member of the House Intelligence Committee. He is Democratic Representative Adam Schiff of California. Congressman Schiff, welcome back to the program. What's the main thing that you think was clarified a
PBS访谈社会系列
STEVE INSKEEP, HOST: Congressman Adam Schiff has a question. The California Democrat is on the House Intelligence Committee. It examined links between President Trump's campaign and Russia. In 2016, Schiff says Donald Trump Jr. met a Russian lawyer a
2019年NPR美国国家公共电台1月