单词：ice-water mixed cloud
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This is Scientific Americans' 60-Second Science. I'm Chelsea Wald. Got a minute? Vinaigrette dressing: when you shake it little vinegar droplets scatter through the oil, but when you put it down, the droplets merge and the dressing separates. That's
Scientific American(二)月
This is the VOA Special English Development Report. The earliest process of making paper was done almost five thousand years ago in Egypt and the Nile Valley. In those days, paper was made from strips of the papyrus plant. Modern paper-making began
VOA慢速英语2008年（二）月
By Tendai Maphosa London 26 June 2007 One of British Prime Minister Tony Blair's biggest concerns has been the plight of Africa, once describing it as a scar on the conscience of the world. For VOA Tendai Maphosa takes a look at Mr. Blair's African l
2007年VOA标准英语（六月）
STEVE INSKEEP, HOST: An Arizona county is taking a long second look at its cooperation with the federal government. Maricopa County, which includes Phoenix, was overseen for years by Sheriff Joe Arpaio. He promoted himself as the country's toughest s
2017年NPR美国国家公共电台3月
Lesson 28 A Block Of Salt 第28课 一块盐 Every day we eat some of the white powder which we call salt. Salt does our bodies good, and keeps them healthy. We eat it at dinner along with our meat. We eat it, too, with eggs, and watercress, and with
英国学生科学读本
What the Student Say in Science Classes 自然科学课上学生们都说了什么 The following quotations were gleaned from classroom discussions in 5th and 6th grade science classes. 下面的这些话都是从五六年级的自然科学课的课堂
英语小达人