In some science-fiction movies, robots refuse to die no matter how people fight back (反击). Now, it has turned into a fact. For the first time, researchers have created a robot that can take a beating (挨打) and keep on working. Developed by scientists from Cornell University and the University of Vermont, the new robot looks like a spider with four legs.

    Until now, even the most advanced robot was almost certain to break down when damaged. That's because its computer doesn't know how to operate the machine after its shape has been changed.

    To solve this problem, the scientists put some sensors (传感器) into the machine. The sensors can read how the machine is working and send signals to the computer.

    Using this information, the system follows a new way to tell the machine's shape at any given moment. The computer considers a lot of possible next steps, and it calculates how best to move the robot forward the longest possible distance, before trying to move it again.

    The new technology is a major advance in robotics (机器人技术), scientists say. It may someday help researchers create better artificial arms and legs that give new freedom to people who lack them. The new knowledge might also help scientists understand how people and animals tell their own sense of place in space.

     “Designing robots that can fit changing environments has been a difficult problem,” says scientist Olaf Sporns of Indiana University. “This work provides a new way toward solving this important problem.”

    Cakan is a successful businessman from Montenegro, who has earned himself nicknames(昵称)like “the best boss” and “Brother” by being surprisingly generous to his employees.

    Cakan, who owns "Cakan Sports", the largest sporting goods store chain in Montenegro, has been making news headlines for years, but not for his professional success. He is best known for the generosity he shows to his faithful and hard-working employees. The businessman firmly believes that his company can boom only if he keeps his employees happy, and to that end, he has offered the best of them some pretty unbelievable presents.

    Cakan first surprised his workers back in 2012, when he offered four of them brand new cars — 2 VW Golf 6 and 2 VW polo — complete with paid insurance. They were some of the oldest and most hard-working employees of Cakan Sports, and since the company had recently moved its operations outside the city, Cakan thought his best people shouldn't have to struggle to get to work. "When we saw them, we were speechless," Danijela, one of the receivers, remembers. "While the boss was saying 'his is a gift for you', all I could think of was 'this is not real, this can't be happening to us'.” But this was just one of the generous ways Cakan has rewarded his employees over the years. In 2014, after hearing that one of his workers had been saving up his paychecks so he could buy a ticket to the world Cup soccer final, in Brazil, he took him there himself, at his own expense.

    Asked why he doesn't use cheaper means of motivating his employees, like a small raise or a cash bonus, Cakan had this to say, "Money comes and goes, but memories are forever." Asked why many of his employees call him "Brother", Cakan told a reporter that it was because "brothers always help each other".

Low-Cost Gifts for Mother's Day

Gift No. 1

    Offer to be your mother's health friend. Promise to be there for any and all doctor's visits whether a disease or a regular medical check-up. Most mothers always say "no need," but another set of eyes and ears is always a good idea at a doctor's visit. The best part? This one is free.

Gift No. 2

    Help your mother organize all of her medical records, which include the test results and medical information. Put them all in one place. Be sure to make a list of all of her medicines and what times she takes them. "Having all this information in one place could end up saving your mother's life," Dr. Marie Savard said.

Gift No. 3

    Enough sleep is connected to general health conditions. "Buy your mother cotton sheets（床单）and comfortable pillows to encourage better sleep," Savard said. "We know that good sleep is very important to our health."

Gift No. 4

Some gift companies such as Presents for Purpose allow you to pay it forward this Mother's Day by picking gifts in which 10 percent of the price you pay goes to a charity (慈善机构). Gift givers can choose from a wide variety of useful but inexpensive things —many of which are "green" — and then choose a meaningful charity from a list. When your mother gets the gift, she will be told that she has helped the chosen charity.

    Snoring(打鼾) is noisy breathing during sleep. It is a common problem among all ages and it influences about 90 million American adults. People most at risk are males and those who are overweight, but snoring is a problem of both genders, although it is possible that women do not present this complaint as frequently as men.

    Snoring is often the loud or harsh sound that can occur as you sleep. You snore when the flow of air makes the tissue in the back of your throat vibrate(颤动) as you breathe. The sound most often occurs as you breathe in air, and can come through the nose, mouth or both two organs. It can occur during any stage of sleep.

    About half of people snore at some point in their lives. Snoring is more common among men, though many women snore. It appears to run in families and becomes more common as you get older. About 40 percent of adult men and 24 percent of adult women are habitual snorers. Men become less likely to snore after the age of 70.

    Sleeping on your back may make you more likely to snore. You may snore when your throat or tongue muscles are relaxed. And substances(物质) that can relax these muscles may cause you to snore. These include alcohol, muscle relaxants and other medicine.

    Snoring can be a nuisance to your partner and anyone else nearby. You may even snore loudly enough to wake yourself up. Though, in many cases people do not realize that they snore. Snoring can also cause you to have a dry mouth when you wake up.

    Light snoring may not disrupt your overall sleep quality. Heavy snoring may be connected with a risk factor in the heart disease, stroke and many other health problems. So never take it lightly.

    In October, I told the eight-year-olds in the class I teach in Pompton Lakes, New Jersey, about my plan. "Since all of you have done extra jobs around the house to earn some money," I said. "Then we'll buy food for a Thanksgiving dinner for someone who might not have a nice dinner otherwise."

    I watched them while they walked up and down the supermarket. "Flowers!" Kristine cried. The group rushed toward the holiday plants.

    "You can't eat flowers."——It was more sensible(明智的) to use any extra money to buy something that could be transformed(转换，转变) into meals.

    "But Mrs. Sherlock," came the begging voice, "we want flowers."

    Defeated finally, I put a pot of "funny" purple(紫色的) mums in the cart full of foods. "She'll like this one," the children agreed.

    An organization had given us the name and address of a needy grandmother who had lived alone for many years. We finally pulled up in front of a small house. A slightly built woman with a weary face came to the door to welcome us.

    My little group ran to get the food. As each box was carried in, the old woman kept on saying "Thanks"—much to her visitors' pleasure. When Amy put the mums on the counter, the woman seemed surprised. She's wishing it was a bag of flour(面粉), I thought.

    We returned to the car. As we fastened our seat belts, we could see the kitchen window. The woman inside waved goodbye, then turned and walked across the room, past the turkey, past the goods, straight to the mums. She put her face in their petal. When she raised her head, there was a smile on her lips. She was transformed before our eyes.

    The children were quiet. At that moment, they had seen for themselves the power they possessed(拥有) to make another's life better. The children had sensed(感到) that sometimes a person needs a bunch of funny purple flowers on a dark November day.

When you think about art, you might consider it to be permanent. After all, that picture you drew in kindergarten might still hang on your refrigerator years later. {#blank#}1{#/blank#} Think about a Broadway performance. When it's over, it's over. Sure, it might live in your memory. But the live show is a special event. It is limited to a certain time and place. 

Can you think of other forms of art that are temporary? If you're a fan of the beach, sandcastles might come to your mind. Have you ever spent hours building a beautiful sandcastle? {#blank#}2{#/blank#} You knew your work of art would be gone as soon as the tide came in. The sandy beach is a canvas where nature erases "paintings" daily. 

Most of the time, art made from sand can't last long. Still, many people love using sand to create their own unique vision of beauty. One of the most attractive types of sand art is sand animation. {#blank#}3{#/blank#} Artists who work in sand animation use sand to make a set of images that usually tell a story. They often start with a large amount of sand on a flat surface, such as a table. They then use their hands and fingers to draw in the sand. 

{#blank#}4{#/blank#} However, the wide variety of beautiful and highly-detailed sand artworks might surprise you. Many of these works or art are temporary. That's where the animation part comes in. 

Sand animation artists create a series of images that move to tell a story. They might also use music and special lighting to complete the effect. Sometimes they photograph or video their creation throughout the process. {#blank#}5{#/blank#}.

A. It is a type of live performance art. 

B. Not all works of art are permanent, though. 

C. Sand animation is beautiful but lasts only for the moment. 

D. Then, they turn it into a sand animation movie when it's finished. 

E. It might seem like using sand would limit the art you could make. 

F. If you have, you would probably be sad when it was time to leave the beach. 

G. Building a sand castle is a family-friendly activity perfect for large groups.