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    音频mp3-Lesson 29 气垫船



    作者:欢乐鱼 阅读次数:6918


     
     



    播放此音频文件需安装 Realplayer <br><<br>oembed>&nbsp;</p><P>&nbsp;<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<SPAN lang=EN-US><A href="http://www.ywhc.net/download/a_d2.asp?s=new/4/lesson29.rm"><FONT color=#0000ff><B>第29课音频文件下载</B></FONT></A></SPAN> Lesson 29<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; The hovercraft<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 气垫船</P><br><P>First listen and then answer the following question.<BR>听录音,然后回答以下问题。</P><br><P>What is a hovercraft riding on when it is in motion?</P><br><P>&nbsp;&nbsp;&nbsp; Many strange new means of transport have been developed in our century, the strangest of them being perhaps the hovercraft. In 1953, a former electronics engineer in his fifties, Christopher Cockerell, who had turned to boat-building on the Norfolk Broads, suggested an idea on which he had been working for many years to the British Government and industrial circles. It was the idea of supporting a craft on a 'pad', or cushion, of low-pressure air, ringed with a curtain of higher pressure air. Ever since, people have had difficulty in deciding whether the craft should be ranged among ships, planes, or land vehicles -- for it is something in between a boat and an aircraft. As a shipbuilder, Cockerell was trying to find a solution to the problem of the wave resistance which wastes a good deal of a surface ship's power and limits its speed. His answer was to lift the vessel out of the water by a great number of ring-shaped air jets on the bottom of the craft. It 'flies', therefore, but it cannot fly higher -- its action depends on the surface, water or ground, over which it rides.<BR>&nbsp;&nbsp;&nbsp; The first tests on the Solent in 1959 caused a sensation. The hovercraft travelled first over the water, then mounted the beach, climbed up the dunes, and sat down on a road. Later it crossed the Channel, riding smoothly over the waves, which presented no problem.<BR>&nbsp;&nbsp;&nbsp; Since that time, various types of hovercraft have appeared and taken up regular service. The hovercraft is particularly useful in large areas with poor communications such as Africa or Australia; it can become a 'flying fruit-bowl', carrying bananas from the plantations to the ports; giant hovercraft liners could span the Atlantic; and the railway of the future may well be the 'hovertrain', riding on its air cushion over a single rail, which it never touches, at speeds up to 300 m.p.h. -- the possibilities appear unlimited.<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; EGON LARSEN The Pegasus Book of Inventors</P><br><P>New words and expressions 生词和短语<BR>&nbsp;&nbsp;&nbsp; hovercraft<BR>n.&nbsp; 气垫船<BR>&nbsp;&nbsp;&nbsp; Norfolk Broads<BR>n.&nbsp; 诺福克郡的湖泊地区<BR>&nbsp;&nbsp;&nbsp; cushion<BR>n.&nbsp; 座垫<BR>&nbsp;&nbsp;&nbsp; ring<BR>v.&nbsp; 围<BR>&nbsp;&nbsp;&nbsp; Solent<BR>n.&nbsp; (英国的)苏伦特海峡<BR>&nbsp;&nbsp;&nbsp; sensation<BR>n.&nbsp; 轰动<BR>&nbsp;&nbsp;&nbsp; dune<BR>n.&nbsp; 沙丘<BR>&nbsp;&nbsp;&nbsp; plantation<BR>n.&nbsp; 种植园<BR>&nbsp;&nbsp;&nbsp; hovertrain<BR>n.&nbsp; 气垫火车</P><br><P><BR>参考译文<BR>&nbsp;&nbsp;&nbsp; 本世纪已研制出许多新奇的交通工具,其中最新奇的要数气垫船了。1953年,有一位50多岁名叫克里斯托弗.科克雷的原电子工程师,改行在诺福克郡的湖泊地区从事造船业,他向英国政府和工业界提出了他研究多年的一项计划。他的设想是:用一个低压空气或软垫来支撑船体,软垫周围用高压空气环绕。自那以后,人们很难决定是否应该将这种运载工具列为轮船、飞机,或是陆上交通工具,因为它是介于船和飞机之间。作为一个船舶技师,科克雷尔在寻找解决波浪阻力的方法,因为波浪阻力浪费掉了船在水面行驶的大量动力,从而限制了船的速度。他的解决办法是把船体提离水面,让船在一个气垫上行驶,气垫只有一两英尺厚。船底装上大量环状喷气嘴以实现这一目的。这样,船就能飞了,但飞不高。它的飞行限决于它所悬浮的水面或地面。<BR>&nbsp;&nbsp;&nbsp; 1959年,在苏伦特海峡进行的首次试航引起了轰动,气垫船先是在水面上行驶,后又登上海岸,爬上沙丘,最后停在路上。后来气垫船跨越英吉利海峡,平衡地在波浪上方行驶,波浪不再产生阻力。<BR>&nbsp;&nbsp;&nbsp; 从那以后,各种各样的气垫船出现了,并开始了定期航行服务。气垫船在非洲、澳大利亚等交通不发达地区特别有用。它能成为“飞行水果盘子”,把香蕉从种植园动到港口。大型的气垫班轮或许能跨越大西洋。未来的火车或许能成为“气垫火车”,靠气垫在单轨上行驶而不接触轨道,时速可达每小时300英里。气垫船的前途是不可限量的。</P> <br> <br></div><br> <br> <br><br> <br> </td><br> </tr><br> <tr><br> </td> </tr> </table> </td> <td width="3%">&nbsp;</td> </tr> <tr> <td width="3%" height="27">&nbsp;</td> <td width="94%" height="27"> <div align="center"></div> </td> <td width="3%" height="27">&nbsp;</td> </tr> <tr> <td width="3%">&nbsp;</td> <td width="94%">&nbsp; <div align="right"><a href="/kbs/index-1.html"> 返回</a><br> <br> </div> </td> <td width="3%">&nbsp;</td> </tr> </table> <br> </td> <td width="162" valign="top" bgcolor="#F3F3F3" height="470">&nbsp; 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