Telepathy (心灵感应) is the ability to communicate without the use of the five senses. It's an instinct (本能) which can be woken up in times of emergency or need. When we feel that something is happening or about to happen by instinct，we're using resources within the unconscious (潜意识的) mind. When the resources of two persons' unconscious minds link together into the same frequency (频率)，we call it telepathy.

    We can either send or receive telepathy. If you know who is calling before you answer the ringing phone，you are probably a good receiver. If you think of a person and he/she calls you，you are most likely to be better at sending.

    You can easily put your ability to the test. Thinking of somebody and wish him or her to contact you. Be patient. The other person may not be a good receiver，but they should contact you much earlier than would normally be expected. Or whenever the phone rings，try ‘feeling' who is contacting you. Don't guess，but try to feel it with your mind. However，if neither of these works for you，that doesn't mean that you have no ability of telepathy. As mentioned earlier，telepathy is most likely to turn up in case of emergency.

    Telepathy dreams often contain telepathic messages. Two people may both dream of the other and find that their dreams have a clear connection. These people are probably linking to each other's unconscious mind.

    Telepathy & relationship. The more people spend time together，the more likely they are to be able to link up to the other's mind，especially when separated. There are two reasons for this. One is that they understand the other's mind through time spent together；the other is that there is usually a strong desire to communicate. A mother will often sense that her child is in danger. This is due to the child's eagerly wanting his or her mother，knowing that this is the person who would always want to be there for them，and the mother's deep desire to protect her child from harm.

    Even nowadays there is a lot of misunderstanding between nationalities. Let's have a look at what the following people have to say.

    Maria Conti: I find the English people insincere, cold and unfriendly. They keep saying "Thank you", "I'm sorry" even when they don't know each other. They are even polite to their own relatives. Except for helping you find your way in the streets, they aren't really friendly and never invite you to their houses.

    Giannis Stinios: On the contrary I found them broad-minded and friendly.I was invited to people's houses and they all showed great interest in my ideas,Greek life and people.In England I learned that it was possible to be warm, friendly and polite at the same time.

    Judy Brown: I lived in both Italy and Greece for a few years.At first there were a few misunderstandings between my foreign friends and myself. For example, I once gave a Greek friend a present for her birthday party.I was rather sorry that she did not unwrap it immediately. What's more, she even didn't thank me until I asked her if she liked it.I've learned from different experiences that a lot of foreigners find our attitude to what we English people call politeness rather insincere. They feel that politeness isn't necessary between friends.

    Imagine jet-setting from Tokyo to Paris, enjoying first-class travel, a four-course dinner and a city tour－all without leaving the ground. This is the future of air travel according to Japanese company First Airlines, which has used the power of virtual reality to create dream vacations.

    Passengers avoid the costly airport transfer, the baggage fees or busy airport terminal（航站楼）－and instead enjoy the privileges of business or first-class travel and an expensive tour of Paris－all while remaining motionless in Tokyo. As well as Paris, First Airlines also offers the virtual destinations of New York, Rome and Hawaii.

    After boarding, guests can settle down for the two-hour flight on their advanced Airbus seat－surrounded by decoration that is modeled on the inside of an aircraft, for maximum realism. There is flight service and VR, foods, music for every destination. Passengers will be served a delicious meal by air stewards, alongside drinks and other desserts. The menu depends on the destination of choice－Manhattan clam chowder and cheesecake for New York and salmon tartar and onion soup for Paris. After landing at the destination, guests can enjoy a 360-degree tour of the destination－all thanks to projection（投影）mapping and video.

    It makes for a supposedly stress-free vacation, perfect for those whose ability to travel abroad is limited by cost or health. Virtual reality is becoming increasingly present everywhere at all times in the world of travel－allowing travelers to appreciate the wonders of the world, all without leaving their house.

    At just 4,980 yen（$ 46）for business class and 5,980 yen（$ 56）for first class－these two- hour flights are far more affordable than their real-life flights. Tokyo citizens eager to experience First Airlines can book a trip on the website, with reservations currently being taken until May 2018.

    Many of us have reached in our pockets, feeling a vibration (振动), wrongly believing our mobile phones have just rung. The phenomenon even has a name: phantom (幻觉的) vibration syndrome—and found it is surprisingly common.

    Now scientists believe that we are so alert (警觉) for phone calls and messages we are misinterpreting slight muscle spasms (痉挛)as proof of a call. Robert Rosenberger, an assistant professor at the Georgia Tech Institute of Technology has studied the delusional calls. He said sufferers describe a vague tingling feeling which they think is their mobile phone indicating it has received a text message or call while on 'silent'. But when the device is retrieved, there was no one on the other end.

    Dr. Rosenberger said he found so many people say, "This happens to me, but I thought I was the only one. I thought I was odd." It seems that the syndrome particularly affects people at the beck and call of mobile phones or pagers. A 2010 study by Michael Rothberg and colleagues found that nearly 70 per cent of doctors at a hospital in Massachusetts suffered phantom vibrations. A more recent study of US college students found the figure was as high as 90 per cent.

    While the odd feeling is widespread, it does not seem to be considered a grave problem. Dr. Rosenberger said: "It's not actually a syndrome in a technical sense. That's just the name that's got stuck to it." He added," Only 2 per cent of people consider it a problem."

    While this phenomenon is widespread, the scientific community has not yet invested much effort in getting to the bottom of why we suffer phantom calls.

    Dr. Rosenberger said: "People are guessing it has something to do with nervous energy. The cognitive(认知的)scientists are talking about brain chemistry, cognitive pathways changing. But it's not like they have brain scans to go on." He said: "We have a phone call in our pocket all the time and it becomes sort of an extension of ourselves. We have this sort of readiness to experience a call. We feel something and we think, OK, that could be a call."

    Johnny Smith was a good math student at a high school. He loved his computer. He came home early every day, then he worked with it till midnight. But Johnny was not a good English student, not good at all. He got an F in his English class.

    One day after school Johnny joined his computer to the computer in his high school office. The school office computer had the grades of all the students: the math grades, the science grades, the grades in arts and music, and the grades in English. He found his English grade. An F! Johnny changed his English grade from an F to A. Johnny' parents looked at his report card. They were very happy.   "An A in English!" said Johnny's Dad. "You're a very clever boy, Johnny." Johnny is a hacker.

    Hackers know how to take information from other computers and put new information in. Using a modem, they join their computers to other computers secretly. School headmasters and teachers are worried about hackers. So are the police, for some people even take money from bank computer account and put it into their own ones. And they never have to leave home to do it! They are called hackers.

    In its early history, Chicago had floods frequently, especially in the spring, making the streets so muddy that people, horses, and carts got stuck. An old joke that was popular at the time went something like this: A man is stuck up to his waist in a muddy Chicago street. Asked if he needs help, he replies, "No, thanks. I've got a good horse under me."

    The city planner decided to build an underground drainage （排水） system, but there simply wasn't enough difference between the height of the ground level and the water level. The only two options were to lower the Chicago River or raise the city.

    An engineer named Ellis Chesbrough convinced the city that it had no choice but to build the pipes above ground and then cover them with dirt. This raised the level of the city's streets by as much as 12feet.

    This of course created a new problem: dirt practically buried the first floors of every building in Chicago. Building owners were faced with a choice: either change the first floors of their buildings into basements, and the second stories into main floors, or hoist the entire buildings to meet the new street level. Small wood-frame buildings could be lifted fairly easily. But what about large, heavy structures like Tremont Hotel, which was a six-story brick building?

    That's where George Pullman came in. He had developed some house-moving skills successfully. To lift a big structure like the Tremont Hotel, Pullman would place thousands of jackscrews (螺旋千斤顶) beneath the building's foundation. One man was assigned to operate each section of roughly 10jackscrews.At Pullman's signal each man tured his jackscrew the same amount at the same time, thereby raising the building slowly and evenly. Astonishingly, the Tremont Hotel stay open during the entire operation, and many of its guests didn't even notice anything was happening.

    Some people like to say that every problem has a solution. But in Chicago's early history, every engineering solution seemed to create a new problem. Now that Chicago's waste water was draining efficiently into the Chicago River, the city's next step was to clean the polluted river.