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Text 1138 Ah, I don¡¯t know if I have enough time today

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    Xiaolu's return process went smoothly. A few days after the moon landing, Berlin held a grand triumphal ceremony. Xiaolu rode in an open car and passed the Brandenburg Gate into Berlin city surrounded by a parade.  Lin Youde gave a speech after Xiaolu entered the city.  ¡°More than ten years ago, we were here to celebrate the victory in the war against the invasion from the old world, but in fact, as many opponents criticized, we just tied with the old world and barely destroyed them and wiped out the new world.  The dawn of humanity continues to sink into darkness, but the old world still exists. We only let half of the earth be enveloped in the dawn of the new world. ¡°But now, we finally have a chance.  Let all the people in the world come under the sunshine of the new world. This is the first step to colonize the moon, and colonizing the moon is the first step to colonize space. This is the real progress of mankind. Although, this is just my daughter.  One small step for humanity, one giant leap for mankind.  This great victory would have been perfect if she had not forgotten the words.  " Lin Youde's words filled the entire "March 18th Square" with laughter. Afterwards, Lin Youde roughly talked about the future development of the universe and gave the crowd a huge and inspiring pie. After climbing to the current position  Later, Lin Youde regretfully discovered that drawing a pie is necessary. The people need to get various promises, and they will be satisfied after getting the promises. If you fulfill the promise, of course it is good. If you cannot fulfill the promise, then draw a pie.  New pie. Lin Youde finally understood why some presidents in the United States failed to fulfill many of their promises after taking office and continued to trick people into voting for him when running for re-election. After drawing this pie, Lin Youde and Xiao Xiao went to the party that night.  Lu returned to Potsdam together to attend the celebration meeting of scientists and engineers. On the second day after the meeting, Lin Youde gathered his top aerospace scientists and engineers together. ** "Everyone, although we have landed on the moon, we have already landed on the moon.  We are still a long way from colonizing the moon.  In the first dozen years, the lunar colony could only rely on materials transported by the earth to develop. Before the colony can become self-sufficient, we need a large amount of colonial blood transfusion.  This involves the biggest threshold in space colonization.  " After Lin Youde finished speaking, he looked around at his scientists and was satisfied to see that everyone knew what he meant. Sure enough, these people had already considered this part. " That is how to send a large amount of materials into the universe.  " This is the threshold for space colonization. Using rockets to launch materials not only transports too little each time, but the cost of transportation is also too high. If materials cannot be sent to the universe quickly and cost-effectively, colonization can only be a dream. "  What are your thoughts on this?  " As soon as Lin Youde finished asking, someone immediately suggested: "We already have room-temperature superconducting materials. If the tokamak successfully operates stably, there will be continuous high-intensity current. How about building an electromagnetic launch orbit?  " "You mean accelerating something to the first cosmic speed in orbit?  Are you crazy? The accelerating strong wind will blow away everything around it, and there will be friction in the track. The heat generated by the friction may melt the steel.  " Immediate rebuttals were raised, and it seemed that this meeting was destined to be a heated exchange of words. " How about creating a very large gravity-free zone?  It triggers a large-scale materialization of imaginary space in the Sahara Desert and creates a large gravity-free zone. According to calculations, as long as the radius is large enough, it can reach the stratosphere directly. We can launch the spacecraft into orbit with just a little push.  " "First of all, to get the spacecraft into orbit, you still have to find a way to get it to critical speed, and you still need a lot of fuel for jet propulsion.  Secondly, after creating that gravity zone, what happens to the sand of the Sahara?  There will be an area on the earth filled with hundreds of millions of tons of flying sand. I think it will be very dangerous for any aircraft to enter it.  When this gravity-free zone disappears, the sand will fall to the ground, which is the free fall of hundreds of millions of tons of material" In this way, several immature ideas were quickly overturned, and the most reliable idea was to create an inexorable  The gravity zone moves with the spacecraft, but the realization of the imaginary space is not a reaction that will disappear immediately. If that plan is adopted, a long gravity-free zone will be left on the launch path of the spacecraft, and these areas will take several months  It will disappear after that. </pé± At this time, von Neumann stood up and said: "We can create a machine that can copy itself" "Dr. Neumann," Lin Youde interrupted Neumann, "  In the future, we may send that kind of machine to serve as the vanguard of mankind's exploration of the universe, but now we cannot build that kind of machine because we cannot combine our entire industry.The production line is condensed into one machine.  " As a science fiction fan, Lin Youde is of course extremely familiar with von Neumann machines. In the famous science fiction game "StarCraft", the main base of mankind is a von Neumann machine, which can produce SCVs, and then SCVs can produce  All human buildings, these buildings can produce all units. The most important thing is that SCV can produce the main base, which means the self-replication of the main base. But it is impossible to create that kind of thing now.  I have heard all the ideas," Lin Youde took this opportunity to continue, "I have a more realistic idea here. Do you remember the story of the Tower of Babel?  "The scientists looked at each other. "I'm not an expert in civil engineering, but it's impossible to build a tower into space," Von Karman said with a frown, "But we have similar ideas and have already done some research.  A level of pre-research should be a more feasible plan, but" "Tell me about your plan.  " "We can hang a cable from the orbiting object to the ground, and then use the cable to lift the cargo.  This system has many advantages. For example, the cable itself will cut the magnetic field lines of the geomagnetic field, thereby generating a large amount of current. Although it may not be enough to support the operation of the entire system, it can indeed reduce consumption.  For another example, the system's cargo box does not need to be lifted too fast. The motor only needs to provide enough power to lift the cargo box itself, and the earth's rotation and the laws of physics will do the rest But there are many problems with this plan.  "    "continue.  Lin Youde showed a satisfied smile. He actually knew that the work done by Fon Karman and his department was just mentioned on purpose.
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