It is quite reasonable to blame traffic jams, the cost of gas and the great speed of modern life, but manners on the road are becoming horrible. Everybody knows that the nicest men would become fierce tigers behind the wheel. It is all right to have a tiger in a cage, but to have one in the driver's seat is another matter.

    Road politeness is not only good manners, but a good sense. It takes the most cool-headed drivers great patience to give up the desire to beat back when forced to face rude driving. On the other hand, a little politeness goes a long way towards reducing the possibility of quarreling and fighting. A friendly nod or a wave of thanks in answer to an act of politeness helps to create an atmosphere of good will and becomes so necessary in modern traffic conditions. But such behavior of politeness is by no means enough. Many drivers nowadays don't even seem able to recognize politeness when they see it.

    However, misplaced politeness can also be dangerous. A typical example is the driver who waves a child crossing the street at a wrong place into the path of oncoming cars that may not be able to stop in time. The same goes for encouraging old ladies to cross the road wherever and whenever they want to.

An experienced driver, whose manners are faultless, told me it would help if drivers learnt to correctly join in a traffic stream without causing total blockages that give rise to unpleasant feelings. Unfortunately, modern drivers can't even learn to drive, let alone master the roadmanship (公路驾车技能). Years ago, experts warned us that the fast increase of the car ownership would demand more give-and-take (互谅互让) from all road users. It is high time for all of us to take this message to heart.

LONDON — A British judge on Thursday sentenced a businessman who sold fake(假冒的) bomb detectors(探测器) to 10 years in prison, saying the man hadn't cared about potentially deadly consequences.

    It is believed that James McCormick got about $77.8 million from the sales of his detectors - which were based on a kind of golf ball finder - to countries including Iraq, Belgium and Saudi Arabia.

    McCormick, 57, was convicted(判罪) of cheats last month and sentenced Thursday at the Old Bailey court in London.

    "Your cheating conduct in selling a great amount of useless equipment simply for huge profit promoted a false sense of security and in all probability materially contributed to causing death and injury to innocent people," Judge Richard Hone told McCormick. "you have neither regret, nor shame, nor any sense of guilt."

    The detectors, sold for up to $42,000 each, were said to be able to find such dangerous objects as bombs under water and from the air. But in fact they "lacked any grounding in science" and were of no use.

    McCormick had told the court that he sold his detectors to the police in Kenya, the prison service in Hong Kong, the army in Egypt and the border control in Thailand.

    "I never had any bad results from customers," he said.

    Friends play an important role in our lives, and although we can't be more familiar with the fact of friendship, we often don't clearly understand how we make friends, especially with Americans. Here are some pieces of advice on making friends with Americans:

    ⒈Visiting places Americans enjoy: parties, churches, restaurants, parks and sports clubs.

    ⒉Be willing to take the first step. Don't wait for them to get close to you. Americans in China may not know you speak English. They may be uncomfortable if they can't speak your language.

    ⒊Use small talks to open the conversation. Ask them where they're from, why they come to China, etc.. Remember: Be careful not to ask personal questions about age, salary and so on.

    ⒋Show an interest in their culture, their country or their job. Americans like to talk about themselves!

    ⒌Invite them to join you for dinner or just for coffee or tea. Try to set a specific(明确的)time. Americans sometimes make general invitations like “Let's go out for dinner sometime. ” Often this is just a way to be friendly. It is not always a real invitation.

    ⒍Don't expect too much at first. Maybe they're being friendly. But maybe they want to be your good friends. It will take time to tell.

    There's a new frontier in 3D printing that's beginning to come into focus: food. Recent development has made possible machines that print, cook, and serve foods on a mass scale. And the industry isn't stopping there.

    Food production

With a 3D printer, a cook can print complicated chocolate sculptures and beautiful pieces for decoration on a wedding cake. Not everybody can do that—it takes years of experience, but a printer makes it easy. A restaurant in Spain uses a Foodini to" re-create forms and pieces" of food that are" exactly the same,” freeing cooks to complete other tasks. In another restaurant, all of the dishes and desserts it serves are 3D-printed, rather than farm to table.

    Sustainability(可持续性)

    The global population is expected to grow to 9.6 billion by 2050, and some analysts estimate that food production will need to be raised by 50 percent to maintain current levels. Sustainability is becoming a necessity. 3D food printing could probably contribute to the solution. Some experts believe printers could use hydrocolloids( 水解胶体)from plentiful renewables like algae(藻类) and grass to replace the familiar ingredients(烹饪原 料). 3D printing can reduce fuel use and emissions. Grocery stores of the future might stock "food" that lasts years on end, freeing up shelf space and reducing transportation and storage requirements.

    Nutrition

    Future 3D food printers could make processed food healthier. Hod Lipson, a professor at Columbia University, said, "Food printing could allow consumers to print food with customized nutritional content, like vitamins. So instead of eating a piece of yesterday's bread from the supermarket, you'd eat something baked just for you on demand."

    Challenges

    Despite recent advancements in 3D food printing，the industry has many challenges to overcome. Currently, most ingredients must be changed to a paste( 糊状物)before a printer can use them, and the printing process is quite time-consuming, because ingredients interact with each other in very complex ways. On top of that, most of the 3D food printers now are restricted to dry ingredients, because meat and milk products may easily go bad. Some experts are doubtful about food printers, believing they are better suited for fast food restaurants than homes and high-end restaurants.

It is the stock response to a parent struggling with a crying baby or a bad-tempered teenager: "Treasure every moment because they grow up so fast." Now researchers have found there may be something in the old saying. Watching children grow up really does seem to make time fly. Scientists have found that parents feel time passing more quickly than non-parents.

The findings could be due to the fact that children change fast. "Over ten years, children go through dramatic changes not only in their physical appearance, but also in their understanding abilities and their status," the researchers said. The results could also be a consequence of parents spending a large amount of their time on their children, they said, even though they found no difference in the time pressures recorded by parents compared with non-parents in the study.

For the study, published in the journal Timing & Time Perception (感知), the researchers asked 431 people aged from 20 to 59 to fill in a subjective time questionnaire, a tool used by psychologists to measure time perception. They were asked: "How fast did the last ten years pass for you?" An answer of very slowly gave a score of-2; slowly was-I; neither fast nor slow was 0; fast was I and very fast scored 2. So the higher the score, the faster they felt time had passed. The parents had an average score of I. 22, compared with 0. 76 for the non-parents.

Participants were also asked how quickly the last year, month and week had passed, but there were no differences between the groups for these shorter intervals (间隔). Previous studies have suggested that time also seems to speed up when we get older. Research published in 2019 by Duke University in North Carolina suggests this could be due to physical changes in our bodies, with a slowdown in image processing speeding up our perception of time passing.

Days that seemed to last forever in our youth were "not due to experiences being much deeper or meaningful", the researcher Adrian Bejan said, "but due to the fact that they were being processed rapidly."

In the 1990s, a psychologist named Martin Seligman led the positive psychology movement, which placed the study of human happiness squarely at the center of psychology research and theory.

Since then, thousands of studies and hundreds of books have been published with the goal of increasing well-being and helping people lead more satisfying lives. But for over 40 years, self-reported measures of happiness have stayed stagnant (停滞的). Such efforts to improve happiness have been an ineffective attempt to swim against the tide, as we may actually be programmed to be dissatisfied most of the time. Why aren't we happier?

Part of the problem is that happiness isn't just one thing. Jennifer Hecht, a philosopher who studies the history of happiness, proposes that we all experience different types of happiness, which are not necessarily complementary Some types of happiness may even conflict with one another. In other words, having too much of one type of happiness may weaken our ability to have enough of the others. For example, a satisfying life is built on a successful career and a good marriage. It takes a lot of work and often requires cutting back on many of life's pleasures. That means we can't spend one pleasant lazy day after another in the company of good friends.

This difficult situation becomes more confused by the way our brains process the experience of happiness. A lot of evidence shows that most of the people possess something called the optimistic bias. They tend to think that their future will be better than the present.

Cognitive psychologists have also identified something called the Pollyanna Principle. It means that people process, rehearse and remember pleasant information more than unpleasant information. Why the good old days seem so good is because we focus on the pleasant stuff and tend to forget the unpleasantness. And if our past is great and our future can be even better, then we can work our way out of the unpleasant present.

Dissatisfaction with the present and dreams of the future are what keep us motivated. In fact, endless happiness would completely destroy our will. Among our earliest ancestors, those who were perfectly content may have been left in the dust.

Recognizing that happiness exists may help us appreciate it more when it arrives. Furthermore, understanding that it's impossible to have happiness in all aspects of life can help us enjoy the happiness that has touched us. Recognizing that no one "has it all" can cut down on the one thing that psychologists know prevents happiness: envy.