标签：trace 相关文章
Food writer T. Susan Chang once embraced the digital age. She even met her husband and bought a house on the Internet. Now, though, she believes in the benefits of an analog, lower-tech lifestyle. I believe in mystery. I believe in family. I believe
2007年NPR美国国家公共电台
Lesson 1 Finding fossil man 发现化石人We can read of things that happened 5,000 years ago in the Near East, where people first learned to write. But there are some parts of the world where even now people cannot write. The only way that they can
新概念英语85年上外美音版
By Mary Morningstar Washington 04 February 2008 At the start of 2007, many critics predicted Jason Michael Carroll could become the next big thing in Country music. As VOA's Mary Morningstar reports, the 28-year-old father of four is proving them rig
VOA常速英语2008年（二月）
By Melinda Smith Washington 09 August 2007 The World Health Organization says a mother's milk is the perfect food for a newborn baby. But worldwide statistics show that breastfeeding is frequently abandoned right after birth. VOA's Melinda Smith ha
2007年VOA标准英语（八月）
Scientists are using DNA to trace illegal ivory from slaughtered elephants to its countries of origin in an effort to nab poachers. Researchers are trying to combat the multi-billion dollar criminal enterprise at its source. A poached elephant Since
VOA标准英语2009年(七月)
By June Soh Washington, D.C. 07 June 2007 The U.S. Justice Department says homicides in the United States are most often committed with guns, especially handguns. And the number of shooting deaths has increased steadily over years. But a new technol
2007年VOA标准英语（六月）
Amnesia 健忘症 When we remember something, the neuron s in our brains communicate with each other in a particular way. The chemical and sometimes even structural changes that occur create a pathway called a memory trace. Signals traveling along th
英语听力文摘 English Digest