单词:positioning technique
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Transcript This is Scientific American's 60-Second Science, I am Cynthia Graber.This will just take a minute. Physicists at the Brookhaven National Laboratory have been able to send information ahead of particle beams racing at nearly the speed of li
Our car is equipped with the GPS so we won't get lost. 我们的车装上了卫星定位系统,所以就不会迷路了。 GPS =Global Positioning System 全球位置测定系统.
If you are like many language students, you might have a problem with procrastination. Perhaps you are slow to do homework or study for a test. Maybe you do not like to study or you become distracted while studying. Whatever the case may be, learning
62 利用现代科技手段控制蝗虫 DATE=6-26-01 TITLE=AGRICULTURE REPORT - Controlling Locusts with Technology BYLINE=George Grow (Start at 59
By Carol Pearson Washington 08 January 2008 New technology makes surgery safer, shortens recovery time and leaves no scars. Both physicians and patients are pleased with the results. VOA's Carol Pearson has more. Maria Viruet recently had her gallbla
Vacationing on the island of Oahu, we were waiting in our tour bus for some stragglers to show up. A man, obviously not with our group, approached the bus and was about to board. How would our driver handle the situation, we wondered. Straight-faced,