【正文】 ys were built above sealevel. In 1860, a better plan was put forward by an Englishman, William Low. He suggested that a double railway tunnel should be built. This would solve the problem of ventilation, for if a train entered this tunnel, it would draw in fresh air behind it. Fortytwo years later a tunnel was actually begun. If, at the time, the British had not feared invasion, it would have been pleted. Recently, there has again been great interest in the idea of a Channel Tunnel. If it is built, it will connect Britain to Europe for the first time in history. Lesson65 Jumbo versus the police 小象對警察 Last Christmas, the circus owner, Jimmy Gates, decided to take some presents to a children39。guard of honour39。Jumbo must weigh a few tons,39。so it was fortunate that we didn39。 Lesson66 Sweet as honey! 像蜜一樣甜！ The Hatheld Puffin is a modern aeroplane, but its designer, Mr John Wimpenny, is finding it difficult to get it off the ground. The reason for this is that this plane is also a bicycle. Its pilot has to pedal hard to get it into the air. After Mr Wimpenny had the plane built, it was tested thoroughly. In 1961, it was the first manpowered aircraft to fly half a mile. While being flown by a champion amateur cyclist in 1963, the plane crashed on an airfield. Since then, Mr Wimpenny has had it rebuilt. He has had the length of the wings increased so that they now measure 93 feetalmost as long as those of a Dakota. Many people have shown interest in this new and unusual sport. But though air cyclists may learn how to fly over short distances, and may, eventually, even get across the English Channel, it is doubtful whether they will ever cycle across the Atlantic. Lesson67 Volcanoes 火山 Haroun Tazieff the Polish scientist, has spent his lifetime studying active volcanoes and deep caves in all parts of the world. In 1948, he went to lake Kivu in the Congo to observe a new volcano which he later named Kituro. Tazieff was able to set up his camp very close to the volcano while it was erupting violently. Though he managed to take a number of brilliant photographs, he could not stay near the volcano for very long. He noticed that a river of liquid rock was ing towards him. It threatened to surround him pletely, but Tazieff managed to escape just in time. He waited until the volcano became quiet and he was able to return two days later. This time, he managed to climb into the mouth of Kituro so that he could take photographs and measure temperatures. Tazieff has often risked his life in this way. He has been able to tell us more about active volcanoes than any man alive. Lesson68 Persistent 糾纏不休 I crossed the street to avoid meeting him, but he saw me and came running towards me. It was no use pretending that I had not seen him, so I waved to him. I never enjoy meeting Bert Dykes. He never has anything to do. No matter how busy you are, he always insists on ing with you. I had to think of a way of preventing him from following me around all morning. 39。 I said. 39。 39。 Bert answered. 39。re not busy doing anything, are you ?39。 No, not at all,39。 I39。 39。 he asked, before I had finished speaking. ‘ Not at all,39。but I39。 39。ll e with you,39。 There39。waiting room !39。Just one more thing, Mr Eames. Let us suppose that a child suddenly crosses the road in front of you. As soon as I tap on the window, I want the car to be stopped immediately.39。Mr Eames,39。 you have just killed that child !39。s footsteps many years later, Sir Malcolm39。s fishing, or eight hours in a cinema seeing the same film over and over again, is usually as far as they get. They have all been put to shame by a boy who, while playing truant, travelled 1600 miles. He hitch hiked to Dover and, towards evening, went into a boat to find somewhere to sleep. When he woke up next morning, he discovered that the boat had, in thetouristshave been picking leaves and cutting their names on the treetrunk. So far, not one of them has been struck down by sudden death! Lesson59 In or out ？ 進(jìn)來還是出去？ Our dog, Rex, used to sit outside our front gate and bark. Every time he wanted to e into the garden he would bark until someone opened the gate. As the neighbours plained of the noise, my husband spent weeks training him to press his paw on the latch to let himself in. Rex soon became an expert at opening the gate. However, when I was going out shopping last week, I noticed him in the garden near the gate. This time he was barking so that someone would let him out ! Since then, he has developed another bad habit. As soon as he opens the gate from the outside, he es into the garden and waits until the gate shuts. Then he sits and barks until someone lets him out. After this he immediately lets himself in and begins barking again. Yesterday my husband removed the gate and Rex got so annoyed we have not seen him since. Lesson60 The future 卜算未來 At a village fair, I decided to visit a fortuneteller called Madam Bellinsky. I went into her tent and she told me to sit down. After I had given her some money, she looked into a crystal ball and said: 39。 As soon as I went outside, I fot all about Madam Bellinsky because my wife hurried towards me. 39。 she asked impatiently. 39。 As she walked away, I followed her out of the fair. Lesson61 Trouble with the Hubble 哈勃望遠(yuǎn)鏡的困境 In future, astronauts will be required to descend from a spaceship while it is still in space and to return to it. The ability to do this will be necessary in future flights to distant plas. Scientists are now trying to discover if this is possible. The spaceship Astra which left the earth a short time ago, will be travelling three hundred miles into space. At a certain point, the Astra will stop for a short time and an astronaut will attempt to leave the stationary spaceship and then return to it. We shall not know whether the experiment has been successful until we have received a radio message. The first message is expected to arrive at 7 o39。s closest friends asked him to make a s