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Focal Length - Distance from the exact center of the dish to the center of the feed. Focal Point - The physical point in space toward which the satellite reflector dish directs the received signal so
By Jim Teeple Jerusalem 21 January 2008 Israel has decided to lift the blockade on the Hamas-controlled Gaza Strip Tuesday to allow a single shipment of fuel and medical supplies into the territory. VOA's Jim Teeple reports from our Jerusalem bureau.
第九章中苹果公司上市。1980年苹果公司正式首次公开筹股(IPO)准备上市,当时的苹果公司价值近18亿美元,乔布斯瞬间名利双收(a man of wealth and fame),25岁的乔布斯身家达到2.56亿美元。可
Chinese scientists have announced a gravitational wave research plan they're dubbing Taiji. The Chinese Academy of Sciences says their research plans will be finalized later this year. Academy member Wu Yueliang says their research will focus on low
Those waves hitting the sand actually begin far out at sea. And it doesnt take much to get them going. A little wind will do the trick. First the wind blows over the surface of the water, generating the little ripples you can see just by blowing acro