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By Paul Sisco Washington 30 March 2007 watch NASA Sun Study Several times each year, scientists and administrators at the US. Space Agency's headquarters in Washington, unveil their most recent discoveries and activities, and plans. VOA's Paul Sisco
A, greet B and ask what he is doing. Hi, Dave. Whatre you doing? Seems youre doing editing work. B, respond to A. Well, I just downloaded an essay from the Net, and have got to make some changes for my literature class. A, make comments on Bs practic
Fade - This is a reduction in the received signal. It is caused by absorption, refraction, or reflection. Fax - This is a shortening of Facsimile, and it refers to one fax machine sending a digital re
DOD Direct Outward Dialing 直拨外线 DOS Disk 0perating System 磁盘操作系统 DOV Data Over Voice 话上数据 DP Data Processing 数据处理 DP Detection Point 检测点,探测点 DP Dial/
Top Technology Stories of 2018 During 2018, we reported on many inventions and new technologies aimed at making machines smarter. We also covered stories on how some technologies threaten user privacy. Artificial intelligence There was a lot of news
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