单词：
单词： 相关文章
By Carol Pearson Washington 30 April 2008 Ten years ago, the U.S. Food and Drug Administration approved LASIK, eye surgery with a laser that enables people to see without glasses. But about five percent of LASIK procedures fail, and those patients ca
VOA常速英语2008年（四月）
Microwave In telecommunications, microwaves are frequencies above 1 GHz. MIPS million instructions per second Modems (MOdulator/DEModulators) Modems are devices that transform digital signals generate
电信英语
By Paul Sisco Washington 14 November 2007 At the McDonald Observatory in western Texas, a unique space program has been quietly underway for more than 30 years. It is called the Lunar Laser Ranging Program. VOA's Paul Sisco has more. Research scienti
VOA常速英语2007年（十一月）
and should as soon think of counterfeiting another's look or step or voice, or of modulating my own by a pitch pipe 一提到演说，就会想到伪造其他人的表情，步伐或声音，抑或通过为笛子定调的方法来调整我自己的音调
美国语文第六册
It's been confirmed Chinese President Xi Jinping is going to be making his first state visit to the US as President. Chinese ambassador Cui Tiankai says discussions are already underway about the logistics of the trip. The date for Xi Jinping's trip
2015CRI中国国际广播电台
Science and technology. 科技。 Neutrino communications 中微子通信 ET, phone home 外星人，致电家中 The world's first neutrino-messaging service 世界上首次中微子通信服务 PARTICLE physics is all very well for addressing trivi
经济学人综合