The first living creatures to travel in space were the dogs of the Soviet Unions space program.Beginning in 1951 dogs flew aboard sub－orbital flights to the height of 63 miles and higher.They helped to test the equipment that would later be used by humans.The first pair of dogs to fly，on July 22，1951，were named Tsygan and Dezik.

     Space dogs would make history on November 3，1957.On this date，just one month after the historic launch of the world's first artificial satellite，Sputnik，the Soviet Union shocked the world again by launching Sputnik 2.This satellite contained the first living creature to travel in space，a dog named Laika.Laika was to have orbited for a week or more until her food and oxygen ran out.In fact，Laika lasted only hours in orbit before over heating in her capsule(太空舱) took her life.

     That next step，occurred in August 1960，when the dogs Belka and Strelka made 18 orbits of earth and returned alive.Like Laika before them，they became distinguished ， featured in newspapers and magazines around the world.

     Six more orbital dog flights over the next eight months further tested the equipment necessary for humans to follow in the dogs' footsteps.That historic event happened on April 12，1961，when Yuri Gagarin became the first human to travel in space.

     The role of the space dogs had proven important in advancing the exploration of space.But，they would make one final flight.In 1966，traveling aboard the Cosmos 110 satellite，the dogs Ugolek and Veterok spent 22 days in orbit.Once again dogs led the way.Humans would not achieve a space flight that long for eight more years，in Skylab 2.

    Booking a trip on an online travel site is convenient, but comes with its own set of problems.

    They know who's going to spend more.

    Last year, US travel research company Orbitz tracked people's online activities to test out whether Mac users spend more on travel than PC users. It turns out that on average, Mac users lay out US $20-30 more per night on hotels. As a result, online travel sites show these users more expensive travel options first. To avoid paying more, sort results by price.

    Their software doesn't always link to the hotel's system.

    A guaranteed reservation is almost impossible to come by anywhere — but the risk of your flight or hotel being overbooked increases with third-party providers. The middleman's software isn't immune(防护作用的) to system errors, so always call the hotel or airline to make sure your booking was processed.

    Don't be fooled by packages: Often, they're low-end items grouped together.

    Ever notice how travel sites recommend a hotel, a rental car, and tour package all in one click? These deals usually feature travel that no one wants, like flights with multiple layovers(中途停留). Check the fine print.

    Once your trip is purchased, you're on your own.

    An online travel agency can't provide assistance the same way an agent can if a flight is cancelled or a room is substandard. Basically, when you arrive at the airport or hotel, you're just another customer who booked at the lowest rate.

    Life often requires people to join in unpleasant situations. Rather often, these unpleasant situations do not happen on their own, but happen because of other people's actions and words. Fortunately, there are useful ways to deal with conflicts(冲突).

    The best way to solve a conflict is not to let it happen. Nothing useful comes out of a conflict. It is a total waste of time and energy for both sides and thus everyone should try his best to prevent conflict. To do this, you will need to learn the points of view your potential opponents (对手) share and the benefits of understanding people around you.

    If the conflict has already arisen, one of the best methods to settle disagreements is to treat the situation with humor. It does not mean, however, that you must ignore（忽视） your opponent's arguments and make jokes about them; it means that you should be in a friendly atmosphere, saying difficult-to-express things with a bit of humor. Humor will help you reduce anger and re-think problems to make them look easier to settle, and set your opponent's mind to working on a problem with you, not against you. This way, a conflict can become an opportunity for building a greater connection between you and your opponent.

    If the situation turns verbally abusive (恶语中伤), put a stop to it. Firmly but calmly state: "You're very angry right now and you're saying things you don't mean. I'm going to excuse myself. We can talk again after you calm down." Then leave the room or ask them to leave.

    I use tea to refer to a snack(点心)taken in the late afternoon or early evening (ie after getting home from work but before the main meal, which I call dinner) and I don't think that's rare(罕见)at all. I think the difference is when you originally had your main meal and I would agree that it's a class thing, not a north/south thing(I've heard the midday meal referred to as both lunch and dinner by different people in all areas of England).

    Dinner was always the main meal. In the past, working class men worked near(or even at)home and came home for their main meal at midday, and so that was their dinner. Middle class men worked in offices far from their homes(often working in the city centre, and living outside the city) and so couldn't go home for a meal at midday. They therefore had a light meal at midday and had their main meal with their family in the evening after they go home from work, so dinner was in the evening. Because most children at state schools were working class, we still use dinner for school meals. For middle and upper class people, tea was a light snack served in the mid-afternoon at which ladies(who didn't, of course, go out to work)could entertain their friends. For working class people, however, tea was the light snack you had before going to bed. Supper, for all classes, was the light snack you had before going to bed.

    However, because work patterns changed and many working class people started eating their main meal in the evening too, dinner, tea and supper started to become interchangeable for them. Also many working class families have since become middle class, so the terms have become less of a current class thing(if class still exists at all) and more of a system of terminology inherited(家族术语)from grandparents etc, different from family to family. When I was a child(Southern English, middle class family, but with working class forebears(祖先)) we called the midday meal dinner and the evening meal tea, but when I was in my early teens I had a new stepfather(from a family that had always been middle class for generations)who used lunch and dinner, and that's what I've used ever since.

    Janus, the Roman god, has two faces looking in opposite directions. So does artificial intelligence (AI). On one side are the positive changes, enabling people to achieve more, far more quickly, by using technology to improve their existing skills. Look the other way, though, and there are plenty of potential pitfalls.

    Like Janus, technological change may also cause disruption(混乱), but AI is likely to have a bigger impact than anything since the appearance of computers, and its consequences could be far more disruptive.

    In the years ahead, AI will raise three big questions for bosses and governments. One is the effect on jobs. Although CEOs publicly praise the broad benefits AI will bring, their main interest lies in cutting costs. One European bank asked Infosys to find a way of reducing the staff in its operations department from 50,000 to 500. The McKinsey Global Institute estimates that by 2030 up to 375m people, or 14% of the global workforce, could have their jobs replaced by AI.

    A second important question is how to protect privacy as AI spreads. The internet has already made it possible to track people's digital behavior in minute detail. AI will offer even better tools for businesses to monitor consumers and employees, both online and in the physical world. Consumers are sometimes happy to go along with this if it results in personalised service or promotions. But AI is bound to bring invasion of privacy that is seen as unacceptable. For example, law-enforcement officials around the world will use AI to spot criminals, but may also monitor ordinary citizens.

    The third question is about the effect of AI on competition in business. A technology company that achieves a major breakthrough in artificial intelligence could race ahead of rivals, put others out of business and lessen competition. This is unlikely to happen in the near future, but if it did it would be of great concern.

    It is too early to tell whether the positive changes brought by AI will outweigh the risk. But it will put an end to traditional ways of doing things and start a new era for business and for the world at large.

The science of setting goals.

It's the time of year when we think to ourselves:our New Year's resolutions will totally work out this time. {#blank#}1{#/blank#}. But what if this year really could be different? Kelly McGonigal, a psychologist, shares four tips. 

Choose a goal that matters, not just an easy win. Our brains love rewards, so we often set simple goals that make it easy to check off boxes. But if that's all are about, no wonder we end up abandoning them so quickly. A meaningful goal requires going deeper. {#blank#}2{#/blank#}. For example, if you want to quit eating junk food, ask why you want to quit it. Then, if you want to quit it for your health, ask why you want good health.

{#blank#}3{#/blank#}.When we set goals, it's easy to focus on that magical ending. But we can't control outcomes. We have to inch toward them, one choice at a time. Ask yourself, "What is the smallest thing I can do today that helps me reach my goal?" If you make daily choices that are consistent with your goal over and over again, you will eventually reach it. 

Frame your goals positively. Focusing on what you want to bring into your life –not what you want to avoid – will make you more likely to actually pursue it. "Any sort of avoidance is going to trigger inhibition systems, {#blank#}4{#/blank#}," says McGonigal.

Prepare for failure. Moments of failure are inevitable, but most of us abandon the goal entirely when minor failures and setbacks start piling up. Your task is not to avoid failures, but to plan for them. Ask yourself, "How am I likely to fail?" For example, if you‘re likely to choose unhealthy meals when you're hungry, carry a light snack that can tide you over. {#blank#}5{#/blank#}.

A. Focus on the process, not the outcome

B. Psychologists call this an emergency plan

C. It really drives home why that goal matters

D. Never mind that we abandoned them very quickly

E. How you describe your goal makes a big difference

F. Think about what you want, and then ask yourself why

G. But positive goals are going to trigger approach and reward motivation