Grown-ups 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 even 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(例外) 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.

    Technology offers conveniences such as opening the garage door from your car or changing the television station without touching the TV.

    Now one American company is offering its employees a new convenience: a microchip implanted (植入) in their hands. Employees who have these chips can do all kinds of things just by waving their hands. Three Square Market is offering to implant microchips in all of their employees for free. Each chip costs $300 and Three Square Market will pay for the chip. Employees can volunteer to have the chips implanted in their hands. About 50 out of 80 employees have chosen to do so. The president of the company, his wife and their children are also getting chips implanted in their hands.

    The chip is about the size of a grain of rice. Implanting the chip only takes about a second and is said to hurt only very briefly. The chips go under the skin between the thumb and forefinger. With a chip in the hand, a person can enter the office building, buy food, sign into computers and more, simply by waving that hand near a scanner. The chips will be also used to identify employees. Employees who want convenience, but do not want to have a microchip implanted under their skin, can wear a wristband (腕带) or a ring with a chip instead. They can perform the same tasks with a wave of their hands as if they had an implanted chip.

    Three Square Market is the first company in the United States to offer to implant chips in its employees. Epicenter, a company in Sweden, has been implanting chips in its employees for a while.

    Three Square Market says the chip cannot track the employees. The company says scanners can read the chips only when they are within a few inches of them. “The chips protect against identity theft, similar, to credit cards.” The U.S. Food and Drug Administration approved the chips back in 2004, so they should be safe for humans, according to the company.

    In the future, people with the chips may be able to do more with them, even outside the office. Todd Westby is Chief Executive Officer of Three Square Market. He says, “Eventually, this technology will become standardized allowing you to use this as your passport, public transit, all purchasing opportunities, etc.”

    Auctions (拍卖行) are everywhere. Here are just a few standouts and some of the areas they specialize in. All have brick-and-mortar (实体的) sales rooms in addition to online buying.

    Leslie Hindman Auctioneers

    Headquarters (总部): Chicago

    Founded: 1982

    Best bets: contemporary art, jewelry

    The founder, Leslie Hindman, has been on an expansion kick from her Chicago base and now runs eight offices across the country. Ms. Hindman said that plenty of items sell at her house for around $500. As in the auction world generally, jewelry and contemporary art receive lots of attention from bidders (出价者), and in 2017 a diamond ring sold for $97,000.

    Swann Auction Galleries

    Headquarters: New York

    Founded: 1941

    Best bets: books, works on paper, African-American art

    Founded as a rare-book auctioneers, Swann still holds dozens of such sales a year. The president, Nicholas D. Lowry, noted that Swann was the first auction house to sell old photographs, in 1952. The house has also had a department of African-American art for 12 years.

    Stair Galleries

    Headquarters : Hudson, N. Y.

    Founded: 2001

    Best bets: English and Continental furniture and paintings, modern and contemporary art

    Colin Stair, the founder and president, comes from a long line of antiques dealers. Stair is frequented by dealers and bargain hunters, and it's a place to find interesting things like a Gorge I carved walnut wing armchair, coming up as part of a sale on April 28 and 29.

    Heritage Auctions

    Headquarters : Dallas

    Founded: 1983

    Best bets: coins, sports memorabilia, movie posters

    With roots in coin auctions Heritage has grown quite large. But their bread and butter are items that the company president, Greg Rohan, calls "the kinds of things that everyone has." "People aren't buying what we're selling for decoration or for resale," he added. "They're buying things they absolutely love."

    Some of Australian cyclists have used "GPS art" to turn a 202 km (125 mile) ride into the outline (轮廓) of a goat, which interests many people greatly.

    The four men marked their route on an app before using it track their journey around Perth. When uploaded to the computer, it was shown as a picture. Cyclist Ben Jones said the group settled on a goat because it was an easy animal to draw. He said the ride lasted more than six hours, with the four men stopping only for food, and flat tyres. "Except for riding 202km,' it's relatively simple," Mr. Jones told the BBC. "You mainly mark your route on the app and it plans directions out."

    GPS art has also been widely used by runners and other cyclists when they travel out. Mr. Jones said his group wanted to shake up their normal weekend ride. "We all ride 10, 000km to 15, 000km a year," he said. "Mostly we just ride together as mates and have a good time—that's what this was about."

    The group received much attention after posting their map to social media this week. Others described Mr. Jones as a goat guy in an interview on Australian television. For their next piece of GPS art, the group plans to draw a local animal such as the koala. "Certainly, there'll be something coming, for we are making our decisions to put more and more plans into practice. I'm sure of that," Mr. Jones said.

In 2019, Thierry Henry, a bus driver, found there was a rise in bike thefts in his city, Reykjavik. Rather than 1 that the bike was gone forever, he decided to take matters into his own hands and started to track down the bikes and return them to their 2 owners. 

The 44-year-old has helped return hundreds of stolen bikes in the past 4 years. His social media account has over 14, 500 members and helps people track down more than just lost bikes. His page 3 to people who have lost tools, cars and other items of high value. On top of his noble act, Henry has helped the bike 4 to reform in the process. 

5 , Henry would deal with the thieves with anger. However, over time, he realized that most of the thefts were driven out of poverty and other issues. He went from feeling 6 towards the thieves, to developing empathy （同理心） for their situations. It was very tough at first. But Henry decided to try to 7 them and just talk to them. 

From this moment onward, he reached out to the thieves, offering help and guidance. After the change in his 8 , Henry found that the bike thieves began to often hand back the bikes to him. Amazingly, some former thieves that Henry helped now 9 him in looking for the stolen bikes. 

"It's like a 10 that has got bigger and bigger, ". says Henry. "It's not only me. Many times, someone spots a bike hidden in a bush and takes a picture. Then someone else comments, 'hey, that's my bike'. "

Thanks to Henry, everyone's looking out.