Chopsticks

    Right now, millions of people are digging into their food with two sticks that have school the test of time as a utensil(烹调用具)for humans. But what's so special about them? {#blank#}1{#/blank#} Personally, I think they teach us the importance of:

    {#blank#}2{#/blank#} 

    If you're ever tried using them, you know that you can't get what you want by just randomly stabbing at the plate. To be able to get what you want, you have to aim for it. There's no way you can pick up everything in one go. Know what you want, and just do it. {#blank#}3{#/blank#} 

    Practice

    Using chopsticks doesn't come naturally. You can't learn to use them by just reading about them. {#blank#}4{#/blank#} It is the same with the real life. You can read as much as you like about all the things you want to do, but it will just amount to dreams and theory if you don't try actually doing it.

    Slowing Down

    {#blank#}5{#/blank#} Why? Because it allows your stomach to tell your brain you're full before you overeat. Eating with chopsticks is a slower process, but that is not necessarily a bad thing. Sometimes we need to slow down and take things one step at a time, so that we have time to think and realize that we don't have to keep charging full speed through life.

A. Aim

B. Motivation

C. What can we learn from them?

D. You have to practice using them

E. Those who eat too fast were less successful at losing weight

F. Sometimes, a little bit of focus makes the difference between failure and success

G. A common health tip is to try to eat with chopsticks when you can

    Everybody is happy as his pay rises．Yet pleasure at your own can disappear if you learn that a fellow worker has been given a bigger one．Indeed, if he is known as being lazy, you might even be quite cross．Such behavior is regarded as "all too human", with the underlying belief that other animals would not be able to have this finely developed sense of sadness．But a study by Sarah Brosnan of Emory University in Atlanta, Georgia, which has just been published in Nature, suggests that it is all too monkey, as well．

    The researchers studied the behaviors of some kind of female brown monkeys．They look smart． They are good-natured, co-operative creatures, and they share their food happily．Above all, like female human beings, they tend to pay much closer attention to the value of "goods and services" than males．

    Such characteristics make them perfect subjects for Doctor Brosnan's study．The researchers spent two years teaching their monkeys to exchange tokens （奖券） for food．Normally, the monkeys were happy enough to exchange pieces of rock for pieces of cucumber．However, when two monkeys were placed in separate and connected rooms, so that each other could observe what the other is getting in return for its rock, they became quite different．

    In the world of monkeys, grapes are excellent goods （and much preferable to cucumbers）．So when one monkey was handed a grape in exchange for her token, the second was not willing to hand hers over for a mere piece of cucumber．And if one received a grape without having to provide her token in exchange at all, the other either shook her own token at the researcher, or refused to accept the cucumber．Indeed, the mere presence of a grape in the other room （without an actual monkey to eat it） was enough to bring about dissatisfaction in a female monkey．

    The researches suggest that these monkeys, like humans, are guided by social senses．In the wild, they are co-operative and group-living．Such co-operation is likely to be firm only when each animal feels it is not being cheated．Feelings of anger when unfairly treated, it seems, are not the nature of human beings alone．Refusing a smaller reward completely makes these feelings clear to other animals of the group．However, whether such a sense of fairness developed independently in monkeys and humans, or whether it comes from the common roots that they had 35 million years ago, is, as yet, an unanswered question．

    Mya Le Thai is a scientist studying at the University of California, Irvine. She recently discovered a process that may result in batteries that last forever. Thai said she had been discouraged that the batteries for her wireless devices degrade. Over time, they fail to charge fully.

    Thai did not like to have keep her wireless laptop connected to an electrical outlet. She decided to do something about that problem.

    At first, she and her team thought about inventing a new battery. But as they experimented, Thai discovered something that might permit lithium-ion(锂离子) batteries to last forever. Lithium-ion batteries power most wireless devices. Over time, the batteries lose the ability to hold a charge. Most of these batteries have a life span of about 7,000 charging cycles before they die.

    One of the reasons lithium-ion batteries degrade is their use of nanowires(纳米线) to carry electricity. Nanowires are extremely thin. A human hair is thousands of times thicker, for example. Nanowires are extremely efficient carriers of electricity, which makes them useful in batteries. But Thai said their thinness also makes them weak. "Nanowires break over time," she said. "That's why they lose capacity."

    But, Thai had a theory: The nanowires might last longer if covered with a material. She and the team tested her theory. The team tried many coverings for the wires. PMMA was one of them. The nanowires were coated with PMMA and cycled through charges 200,000 times. The PMMA coated nanowires showed no evidence of damage. The results suggest that batteries could last forever, without losing charging ability.

    Thai hopes to continue her research to understand why this material works so well and to see if any other material could create better results.

"It's kind of cool," she said. "I'm really glad people are showing interest in my work and not just in the work itself, but also in technology and energy."

    Sooner or later, many families will face the situation of moving. The experience can be very bad for kids, who may not be a part of the decision to move and may not understand it. You can take steps to make the entire process (过程) easier for everyone.

    Many kids like to stay in familiar places. So as you consider a move, weigh the benefits (好处) of that change against the comfort that neighborhood, school, and social life give your kids. If your family has recently dealt with a big life change, such as death, you may want to put off a move to give your children time to accept the fact.

    The decision to move may be out of your hands, perhaps because of a new job or money problems. Even if you're not happy about the move, try to keep a positive (积极的) attitude to it. During the move, a parent's attitude can greatly influence kids.

    No matter what the results are, the most important way to prepare kids to move is to talk about it. Try to give your children as much information about the move as possible. You can ask kids to join in the planning such as house-hunting or the search for a new school. This can make the change feel less like it's being forced on them. If you're moving across town, try to take your children to visit the new house and the new neighborhood.

    A move can have many problems, but good things also come from this kind of change. Your family might grow closer and you may learn more about each other by going through it together.

Pieter Bruegel's iconic 1565 painting The Harvesters hangs at The Metropolitan Museum of Art. The work shows people harvesting wheat nearly as tall as they are. "Nowadays, however, if you walk through a wheat field, you basically see that wheat is about knee-height. The reduced height is essentially a consequence of being bred (培育) along with genes for increasing production to feed a growing population," biologist De Smet explained.

De Smet said wheat was just one example of how historical artwork could allow us to track the transformation of food crops over time. He teamed up with art historian Vergauwen, a friend since childhood, to document such art work around the world. They have been mainly looking at things where they can spot changes in shape, color and size.

Their interest in plants in artwork began with a visit to the Hermitage Museum, where they noticed an odd-looking watermelon in an early-17th-century painting. It appeared to be pale and white on the inside. Biologist De Smet assumed the painter had done a poor job. But art historian Vergauwen had a different idea. "No, this is one of the best painters ever from that era. So if he painted it like that, that's the way it must have looked like," he explained.

Other paintings revealed that both red and white watermelons were grown during the 17th century. "With all the genetic knowledge we now have, we can look at how something comes about in more detail," said De Smet. "For example, until the 18th century, European strawberries appeared tiny in paintings. They then grew in size as they were crossbred with North American varieties."

Ultimately, the team hopes to create an online research database of historical plant artwork. They seek the contributions of art enthusiasts around the world via the social media. "However," Vergauwen reminds, "if you're going to use, for example, Picasso to try and understand how a pear looked in the early 20th century, you might be misled."

Smart and highly sensitive （灵敏的）, a new soft sensor developed by UBC (University of British Columbia) and Honda researchers opens the door to a wide range of applications in robotics and prosthetics （假肢）.

When applied to the surface of prosthetic or robotic arms, the sensor skin provides touch sensitivity and flexibility, making it possible for difficult tasks to be completed by machines, such as picking up a piece of soft fruit. The sensor is also soft to the touch, like human skin. which helps make human interactions safer and more lifelike.

"Our sensor uses weak electric fields to sense objects, even at a distance, much as touchscreens do. But unlike touchscreens, this sensor is soft and can detect forces into and along its surface," explained Dr. John Madden, senior study author and a professor of electrical and computer engineering who leads the Advanced Materials and Process Engineering Laboratory at UBC.

The UBC team developed the technology in cooperation with Frontier Robotics, Honda's research institute. Honda has been innovating in humanoid robotics since the 1980s, and developed the well-known ASIMO (Advanced Step in Innovative Mobility) robot. It has also developed devices to assist walking and the emerging Honda Avatar Robot.

"Dr. Madden's lab has significant expertise in flexible sensors and we're happy to cooperate with this team in developing touch sensors that can be applied to robots," said Mr. Ishizaki Ryusuke, one of the study's lead authors and chief engineer at Frontier Robotics.

Dr. Madden said, "Human skin has a hundred times more sensing points on a fingertip than our technology does, making it easier to light a match or sew. As sensors continue to develop to be more skin-like, and can also detect temperature and even damage, there is a need for robots to be smarter about which sensors to pay attention to and how to respond. Developments in sensors and artificial intelligence will need to go hand in hand."