单词：modulating anode
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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
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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Batteries of the future need to deliver more energy, and they need to be smaller. Researchers at MIT think they have developed a technology that can, a
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This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Common batteries are electrochemical cells. And they may get better thanks to living cells: the multicellular organism called brown algae. Lithium ion
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Africa Kicks-up A Lot of Dust 非洲大陆的灰尘飘向美国 Bits and pieces of the African continent are falling on the United States and surrounding regions much of the year. Scientists say large amounts of African dust may be having major effec
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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
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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
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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
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