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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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2030�뀈源뚯�� �솴�냼 �벑�뿉 �삱�씪���湲� |
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| 肄붾줈�굹19濡� �쟾 �꽭怨꾩쓽 寃쎌젣媛� 移⑥껜瑜� 留욎씠�븯怨� �엳�떎. �삁�긽移� 紐삵븳 蹂��닔濡� �씤�빐 二쇱떇 �떆�옣�뿉�룄 鍮④컙 �벑�씠 耳쒖죱�떎. 洹몃윭�굹 2030�뀈源뚯���쓽 �옣湲곗쟻 異붿꽭瑜� 蹂대㈃ 二쇱떇 �떆�옣��� 怨꾩냽 �긽�듅�꽭�뿉 �엳�떎. 硫붽���듃�젋�뱶濡쒖꽌 二쇱떇 �떆�옣�쓽 �쁽�옱��� 誘몃옒瑜� �븣�븘蹂댁옄. |
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Mending a Broken Hea |
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| Worldwide, about 23 million people have heart attacks each year. Half of them die within five years. In the United States alone, heart failure costs $40 billion a year. |
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21�꽭湲� �끂�떎吏�瑜� �빟�냽�븯�뒗 �옄�룞�솕 怨� |
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| �씤媛꾩씠 �닔�뻾�븯�뒗 怨쇳븰 �떎�뿕怨� 諛쒓껄�뿉�뒗 �븳怨꾧�� 議댁옱�븳�떎. �븯吏�留� �씤怨듭���뒫怨� 而댄벂�똿, 濡쒕큸�쓣 �넻�븳 怨쇳븰 �떎�뿕怨� 諛쒓껄�뿉�뒗 �븳怨꾧�� �뾾�떎. �삤�뒛�궇, �씠�윭�븳 �깉濡쒖슫 怨쇳븰 �떎�뿕怨� 諛쒓껄�뿉 ����븳 嫄곕���븳 ���吏곸엫�씠 �씠誘� �떆�옉�릺�뿀�떎. �쁽�옱 �뼱�뼡 �씪�씠 �씪�뼱�굹怨� �엳�뒗媛�? |
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New Tools Help Harne |
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| If you know what a ��쐀log��� is, you��셱e in the elite minority of Americans who are aware of this key source of information and insights. Only 38 percent of all Internet users know what a blog is, according to a study by the Pew Internet & American Life Project released in January 2005.1 |
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