Grown­ups are often surprised by how well they remember something they learned as children but have never practiced ever since. A man who has not had a chance to go swimming for years can still swim as well as ever when he gets back in the water. He can get on a bicycle after many years and still ride away. He can play catch and hit a ball as well as his son. A mother who has not thought about the words for years can teach her daughter the poem that begins “Twinkle, twinkle, little star” or remember the story of Cinderella or Goldilocks and the Three Bears.

    One explanation is the law of overlearning, which can be stated as follows: Once we have learned something, additional learning trials(尝试)increase the length of time we will remember it.

    In childhood we usually continue to practice such skills as swimming, bicycle riding, and playing baseball long after we have learned them. We continue to listen to and remind ourselves of words such as “Twinkle, twinkle, little star” and childhood tales such as Cinderella and Goldilocks. We not only learn but overlearn.

    The multiplication tables(乘法口诀表)are an exception to the general rule that we forget rather quickly the things that we learn in school, because they are another of the things we overlearn in childhood.

    The law of overlearning explains why cramming(突击学习)for an examination, though it may result in a passing grade, is not a satisfactory way to learn a college course. By cramming, a student may learn the subject well enough to get by on the examination, but he is likely soon to forget almost everything he learned. A little overlearning, on the other hand, is really necessary for one's future development.

    Food production does great harm to our environment. There are many procedures involved in the manufacture of food that result in greenhouse gases and other pollutants. Some procedures require the consumption of large amounts of fossil fuels, such as the transportation and storage of food products. Other factors that cause great damage to our environment include the overuse of fresh water.

    The production of beef is more damaging to the environment than that of any other food we consume. Raising large numbers of cattle requires the production of large amounts of food for the animals. It's estimated that producing one pound of beef requires seven pounds of feed.

    Land use is also a problem. If the cattle are free-range cattle, large areas of land are required for them to live on. This has led to disastrous forest cutting and the loss of rare plants and animal species, particularly in tropical rain forests in Central and South America.

    Another problem specific to beef production is methane emissions (甲烷排放). Although many people are aware of the damaging effects of carbon dioxide, they don't realize methane's global warming potential is 25 times worse, making it a more dire problem.

    Unfortunately, beef consumption is growing rapidly. This is the result of simple supply and demand factors. Specifically, there are two main causes of demand that are encouraging the production of more supply. First, the increase in the world population means there are more people to consume meat. The second factor is socioeconomic advancement. As citizens in developing nations become financially stable, they can afford to buy more meat.

    Therefore, one way to reduce the greenhouse gas emissions is for people around the world to significantly cut down on the amount of beef they eat.

    Even now, almost a year after their astonishing act of group heroism, the dozens of people who risked their lives to save two boys from drowning in Panama City Beach, are still remembered.

    The story began on July 8, 2017. Members of the Ursrey family, eight in total, were enjoying an evening together at the beach. As the sun sank lower on the horizon（地平线）, the two boys—Noah, 11, and Stephen, 8—took their skateboards and walked into the waves without the grown-ups noticing. When the boys were about 70 yards from shore, they realized that the ocean pulled them out to sea. After trying and failing to paddle（涉水）back, they started waving and screaming for help. But the lifeguards had clocked out for the evening.

    The boys had been struggling for several minutes when Brittany and Tabatha Monroe, a married couple from Georgia, wandered by. They didn't see the boys at first, but they heard them.

    They jumped into the water and easily reached the brothers, who were still in fairly shallow water. The woman reassured the frightened boys and seized their skateboards, telling them they would be safe and then discovered that they, too, were now in a world of trouble. They couldn't get back to shore and could barely and only occasionally hit the sandy bottom with their feet. After a few minutes, it was clear to the woman that they were all trapped in a terrible whirlpool.

    Then scores of tourists were walking to them, hand in hand, forming a line. Soon the first person held the woman's hand. In turn, her husband and the two boys joined her. The long line moved slowly until they were back to the safety of the beach.

    The rescuers call it the Human Chain. But it was the deeply “human” aspect of the rescuers' cooperation（合作）that made it so astonishing and successful.

    Why do some people live to be older than others? You know the standard explanations: keeping a moderate diet, engaging in regular exercise, etc. But what effect does your personality have on your longevity(长寿)? Do some kinds of personalities lead to longer lives? A new study in the Journal of the American Geriatrics Society looked at this question by examining the personality characteristics of 246 children of people who had lived to be at least 100.

    The study shows that those living the longest are more outgoing, more active and less neurotic (神经质的) than other people. Long-living women are also more likely to be sympathetic and cooperative than women with a normal life span. These findings are in agreement with what you would expect from the evolutionary theory: those who like to make friends and help others can gather enough resources to make it through tough times.

    Interestingly, however, other characteristics that you might consider advantageous had no impact on whether study participants were likely to live longer. Those who were more self-disciplined, for instance, were no more likely to live to be very old. Also, being open to new ideas had no relationship to long life, which might explain all those bad-tempered old people who are fixed in their ways.

    Whether you can successfully change your personality as an adult is the subject of a longstanding psychological debate. But the new paper suggests that if you want long life, you should strive to be as outgoing as possible.

    Unfortunately, another recent study shows that your mother's personality may also help determine your longevity. That study looked at nearly 28,000 Norwegian mothers and found that those moms who were more anxious, depressed and angry were more likely to feed their kids unhealthy diets. Patterns of childhood eating can be hard to break when we're adults, which may mean that kids of depressed moms end up dying younger.

    Personality isn't destiny, and everyone knows that individuals can learn to change. But both studies show that long life isn't just a matter of your physical health but of your mental health.

    Italian Language Immersion Class in Chicago, Illinois

    Language stars:

    FunImmersion Italian class at Language Stars in Illinois provides fun, full language immersion programs (全语言沉浸式教学) for children aged (1-10). Also: Spanish, French, German and Mandarin Chinese. Throughout their 3-hour class every day, the children take part in full-immersion activities, create art projects, sing and enjoy themselves all in Italian!

    Quality teachers:

    Teachers are the single greatest driver of the quality of our programs! Language Stars carefully selects our native-speaking Italian teachers, who have received extensive (广泛的) training before starting their teaching careers.

    Teaching Style:

    Language Stars makes learning a language fun, through a mix of games, songs, puppet shows, arts & crafts, cooking projects, treasure hunts, movement and drama, all in the foreign language. Our unique FunImmersion method is the best way for children to enjoy learning a foreign language.

    The Benefits of Learning a Language at a Young Age:

    It is uniquely suitable for young children to learn a second language. Exposing your child to a second language allows a child to optimize (使最优化) his or her learning potential, helping to shape the brain at its most flexible stage. Learning a second language at a young age is as easy as learning a first language.

    Language Immersion Programs for Kids (Aged 1-10):

    Language Stars offers play-based, full immersion programs in small groups of 4-8 children in Italian, Spanish, French, German and Mandarin Chinese in three exciting formats:

    Parents & kids (Aged 1-3)

    Kids Only Classes (Aged 3-5, 5-8, 8-10)

    Summer Immersion Camp

    Free Trial Class:

    During a free class we encourage your child to participate as if he / she is enrolled.

    Tuition Fee:

    $ 600

    Address:

    2105 N. Southport, Chicago, Illinois, USA

    Are you interested in hi-tech products? Here are some that you might find at the market now.

    CX-1

    Tired of dragging your bag through busy airports? Then you might want to consider CX-1. The smart suitcase uses facial recognizing software to follow its owner as he/she is checking in or heading to the gate. Though CX-1 can only move at a speed of up to seven miles per hour, a tiny tool enables owners to keep track of the suitcase's location. Happily, it has been sold on the market.

    Aibo

    Sony's latest version of the Aibo robotic dog is almost as fun as the real thing — but much less work. The pet dog can recognize its owner, obey several commands, and even recall the behavior that pleases its master the most. Aibo can also learn new tricks, take photographs, and over time, develop its own unique personality.

    Forpheus

    Forpheus, an "athletic" robot developed by Japanese technology company Omron. It teaches users how to play ping-pong. The 10-feet-tall machine uses a camera and artificial intelligence to track the ball's speed and can predict the ball's direction correctly. The smart Forpheus can also quickly test its player's abilities and adjust the playing level, making the game fun.

    Black Box VR

    Though many people determine to go to the gym once a week, few reach their goal. Black Box VR wants to change that by turning hard exercise into fun video games. Using it, gym users will find themselves fighting enemies, including big creatures — all while getting exercise.