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China"s Trouble |
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| Anyone who goes to visit China today sees the progress that has made headlines. |
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The Brave New World |
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| One of the long-held dreams of medical science is to find drugs that will increase intelligence and boost brain performance, aid concentration, and generally give us more control over thought, memory, and cognitive functioning. Some scientists now believe that the dream isn��셳 far from reality. |
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�떎由ъ퐯諛몃━�쓽 �떆���媛� �걹�굹怨�, �깉濡쒖슫 |
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| 誘멸뎅 �궡 �룄�떆 �씤援ъ쓽 �쑀�엯怨� �쑀異쒖뿉 �엳�뼱 �뙣�꽩 蹂��솕媛� �씪�뼱�굹怨� �엳�떎. 肄붾줈�굹19�뒗 �씠�윭�븳 �뙣�꽩 蹂��솕瑜� �뜑�슧 媛��냽�솕�븯怨� �엳�떎. �뼱�뼡 �룄�떆��� 吏��뿭�뿉 �씤援ш�� �뒛怨�, 二쇰뒗媛�? �씠�쑀�뒗 臾댁뾿�씤媛�? �씠�윭�븳 �뙣�꽩 蹂��솕�뒗 �뼱�뼡 寃곌낵瑜� 媛��졇�삱 寃껋씤媛�? |
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The Outlook for HDTV |
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| In the late 1990s, when the first television channels began offering high-definition television, few U.S. households had HDTV sets to receive the signals, and it��셲 no wonder: Shows in high-def were scarce, and the average price of an HDTV set was $3,147. |
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The Radio Frequency |
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| In the last few years, the electromagnetic spectrum has quietly become a critical part of contemporary life. It enables you to communicate with mobile phones, use remote controls, tune in TV stations, pop corn in the microwave, open your car door without a key, listen to radio stations, and surf the Internet when you��셱e sipping coffee at Starbucks. |
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