There are good reasons to value our friendships.Some years ago a public-opinion research firm,Roper Starch Worldwide,asked 2007 people to name one or two things that said the most about themselves.Friends far outranked homes jobs, clothes and cars.

    “Ironically,” says Brant R.Burleson, professor of communication at Purdue University in West Lafayette, Ind., “the better friends you are, the more likely you'll face conflicts.” And the outcome can be what you don't want—an end to the relationship.

    The good news is that most troubled friendships can be mended.

    Swallow your pride. It wasn't easy, but that's what Denise Moreland of Hickam Air Force Base in Hawaii did when a friendship turned sour.For nearly four months,Moreland,45,had watched over Nora Huizenga's two young daughters, who were living with their father on the base,while Huizenga,40,completed training as a dental hygienist in Nevada.“I felt honored to be asked to step in,” Moreland says.

    “When Huizenga returned at Christmas,” Moreland recalls,“I had so much to tell her, but she never called.”

    One daughter had a birthday party, but Moreland wasn't invited. “I felt like I'd been used,” she says.At first, Moreland swore to avoid Huizenga.Then she decided to swallow her pride and let her friend know how she felt. Huizenga admitted that she'd been so worried about being separated from her family that she'd been blind to what her friend had done to help her. Today she says, “I would never have figured out what happened if Denise hadn't called me on it.”

    When a friend hurts you, your instinct is to protect yourself.But that makes it harder to solve problems,explains William Wilmot,author of Relational Communication.“Most of us are relieved when differences are brought out in the open.”

    Apologize when you're wrong—even if you've also been wronged.But over the course of a friendship, even the best people make mistakes. “We don't think clearly when we're arguing,” says Michael Lang,a professional mediator (调解人) in Pittsburgh. Instead, says Lang, ask: “What's going on? This doesn't make sense.”

    See things from your friend's point of view. Sociologists Rebecca Adams Rosemary and Blieszner interviewed 53 adults who each had many friendships lasting decades. “We were curious how these people managed to sustain strong friendships for so long,” says Blieszner. Tolerance is key, the researchers learned.” It's surprising how often a dispute results from a simple misunderstanding,” adds psychotherapist Anne Frenkel.

    Accept that friendships change. “Friendships change as our needs and lifestyles change,” Wilmot observes.

    Making friends can sometimes seem easy,says Yager.The hard part is keeping the connections strong during the natural ups and downs that affect all relationships.Her suggestion: Consider friendship an honor and a gift,and worth the effort to treasure and nurture.

    It is very important for kids to be courageous. A brave child is more likely to withstand negative peer pressure, say no to temptations（诱惑）and flight the good fight.{#blank#}1{#/blank#} It boosts kids' resilience（适应力）, confidence and willpower as their as well as their learning, performance and school engagement. Here are several ways to develop kids' courage:

    Model courage. Kids who watch their parents stick their necks out to do the right thing are more likely to do the same.{#blank#}2{#/blank#} Then express how good it feels when you conquer your fear instead of taking a shortcut. Your kids will learn how to take on the tough challenge they face by witnessing how you tackle your fears.

    {#blank#}3{#/blank#} Research finds that kids are more likely to be courageous if they believe that their parent them to support those in need. Discuss bravery with your kids: Tell hem Courage is making the choice to do what you know is right even if you are afraid.”

    Ask your kids to share their acts of bravery. Learning to be brave takes practice, so encourage your children to do something courageous every day.{#blank#}4{#/blank#}A mom I talked to had her kids share their brave deeds at dinner time.

Teach your kids how to reduce their fears. If not kept under control, fear can be powerful.{#blank#}5{#/blank#} You might encourage positive self-talk, such as saying, “I can handle this” or “I have courage to do this.” Or teach your child to take slow, deep breaths to find courage.

A. Talk about values and courage.

B. Courage has other surprising benefits.

C. The good news is that courage can be taught.

D. Teach your child simple strategies to be brave.

E. Let your child see you step out of your comfort zone.

F. In today's uncertain world, kids will need courage and confidence.

G. Then take time to focus on their courageous breakthroughs.

    Your life is composed of all the little things we experience everyday, and knowing how to find joy in some of those little things is one of the easiest ways to let happiness slowly fill your cup. In order for that to happen, you need to do two very simple things, put yourself in such situations that you can experience happiness there, and then find a way to savour the experience and let it sink into you.

    To put yourself in the position of experiencing happiness every day, Lahan Catalino, Ph.D, at the University of California, San Francisco, recommends an approach called “prioritizing positivity”—organizing your day-to-day life on purpose so that it contains situations which naturally give rise to positive emotions. It involves both carving out time in your daily routine to do things that you really love and heavily weighing the positive emotional consequences of major life decisions, like taking a new job, and you will regularly find yourself.

    Then how can we find away to savour the happy experience and let it sink into you? Here is what psychologist Rick Hanson, the author of Buddha's Brain explains.

    Let a good fact become a good experience.

    Often we go through life and some good thing happens—a little thing like we checked off an item on our To Dc list, we survived another day at work, the flowers are blooming, and so forth. Hey, this is an opportunity to feel good. Don't leave the money lying on the table: recognize that this is an opportunity to let yourself truly feel good.

    Really enjoy this positive experience.

    Practice what any school teacher knows: if you want to help people learn something, make it as intense as possible—in this case, as felt in the body as possible—for as long as possible.

    When sinking into this experience, sense your intention that this experience is sinking into you.

    Sometimes people do this through visualization, like by sensing a golden light coming into themselves or a soothing balm inside themselves. You might imagine a jewel going into the treasure chest in your heart—or just know that this experience is sinking into you, becoming a resource you can take with you no matter where you go.

    It might seem a little cliche to say“stop and smell the roses”, but it's moments like those that can be stored in your happiness bank and withdrawn later. Living a happy life can be as simple as accepting the happiness that's already around you. If you want more, it's OK to go out and achieve it, but don't forget where happiness really comes from.

    Each year there is an increasing number of cars on roads and streets as millions of new cars and trucks are produced. One out of every six Americans work at putting together the parts of cars, driving trucks, building roads or filling cars and trucks with gas. {#blank#}1{#/blank#} Because most Americans find they are using their cars in almost every aspect of their life. {#blank#}2{#/blank#} The polluted air becomes poisonous and dangerous to health.

    {#blank#}3{#/blank#} That's what several of the large car factories have been trying to do. But to build a clean car is easier said than done. Progress in this field has been slow.

Another way is to take the place of the car engine by something else.{#blank#}4{#/blank#} Many makers believe that it will take years to develop a practical model that pleases man.

To prevent the world from being polluted by cars, we'll have to make some changes in the way many of us live. Americans, for example, have to cut down on the number of their total cars. They are encouraged to travel and go to work by bicycle. Bicycling is thought to help keep the air clean. But this change does not come easily. A large number of workers may find themselves without jobs if a car factory closes down.{#blank#}5{#/blank#}

    Although cars have led us to a better life, they have also brought us new problems.

A. Americans know cars very well.

B. Americans won't live without cars!

C. Inventors are now working on steam cars as well as electric cars.

D. However, the number of vehicles has continued to increase in recent years.

E. One way to get rid of the polluted air is to build a car that does not pollute.

F. Thus the problem of air pollution would become less important than that of unemployment.

G. However, some have realized the serious problems of the air pollution that is caused by cars.

AlphaZero--an Updated Model of AI

    Soon after Garry Kasparov, the former world chess champion, lost his rematch against IBM's Deep Blue in 1997, the short window of human-machine chess competition slammed shut forever. Unlike humans, machines keep getting faster, and today a smartphone chess app can be stronger than Deep Blue. However, as people see with the new AlphaZero system, machine dominance has not ended the historical role of chess as a laboratory of cognition.

    Much as airplanes don't flap their wings like birds, machines don't produce chess moves like humans do. Based on a generic algorithm (算法), AlphaZero incorporates deep learning and other AI techniques like Monte Carlo tree search to play against itself to develop its own chess knowledge. Unlike the traditional program Stockfish, which employs many preset evaluation functions as well as opening and endgame moves, AlphaZero starts out knowing only the rules of chess, with no preset human strategies. In a few hours, it plays more games against itself than have been recorded in human chess history. It teaches itself the best way to play, reevaluating the relative values of the pieces. It quickly becomes strong enough to win 28, draw 72, and lose none in a victory over Stockfish. Since AlphaZero can program itself, this superior understanding allows it to outclass the world's top traditional program despite calculating far fewer positions per second. It's the typical example of the cliché, "work smarter, not harder".

    AlphaZero shows that machines can be the experts, not merely expert tools. Explainability is still an issue—it's not going to put chess coaches out of business just yet. But the knowledge it produces is information humans can learn from. AlphaZero is surpassing humans in a profound and useful way, and researchers are working on transferring the knowledge acquired from AlphaZero to other fields.

    Machine learning systems aren't perfect. Even though great progresses have been achieved, AI algorithms are still struggling on open problems such as computer vision, natural language understanding... There will be cases where an AI will fail to detect exceptions to its rules. Therefore, as Kasparov writes, "We must work together to combine our strengths. I know better than most people what it's like to compete against a machine. Instead of raging against them, it's better if we're all on the same side."