单词:arc-driven supersonic laser
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Jackie: Hello Im Jackie Dalton and today, were going to find out about space travel and look at some science language. Were going to do this with the help of Jeff Hoffman. Hes a former NASA astronaut an astronaut a person who goes into space. Hes goi
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
Everybody! 大家注意 I've decided to send Matt and Ben along with Lieutenant Clayton. 我已经决定让马特和本与克莱顿中尉一同出发 It'll put our kids a few hours ahead of whatever else is coming, 无论发生什么,孩子们都能提
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
Bionic Christina Aguilera Are you ready, ready, ready to go-g-g-go? Are you ready, ready, ready to go-g-g-go? Bionic, take it supersonic, eh I'm bionic; hit you like a rocket, eh-ay-yeh Bionic, so damn bionic, eh Gonna get you with my electronic, sup
1,000mph Target for British Car 英国制造时速达1000英里/小时的高速汽车 A British team has begun building a car designed to smash all previous land speed records and go faster than even the speed of sound. The supersonic car, called Blo