【推荐1】A punctual (准时的) person is in the habit of doing a thing at the proper time and is never late in keeping an appointment.

    1    He is always in a hurry and in the end loses both time and his good name. A lost thing may be found again, but lost time can never be regained. Time is more valuable than material things.    2    . The unpunctual man is forever wasting and mismanaging his most valuable assets as well as the assets of others’. The unpunctual person is always complaining that he finds no time to answer letters or return calls or keep appointments promptly.     3    He knows that he cannot get through his huge amount of work unless he faithfully keeps every piece of work when it has to be attended to.

Failure to be punctual in keeping one’s appointments is a sign of disrespect towards others. If a person is invited to dinner and arrives later than the appointed time, he keeps all the other guests waiting for him.     4    .

Unpunctuality, moreover, is very harmful when it comes to doing one’s duty, whether public or private. Imagine how it would be if those who are put in charge of important tasks failed to be at their proper place at the appointed time.    5    

【推荐2】A group of blue-faced birds step through the grass shoulder to shoulder, red eyes looking around. They look like middle schoolers seeking a cafeteria table at lunchtime. Perhaps they’re not so different.

A new study, led by Damien Farine, an ornithologist who studies collective behaviour, shows that vulturine guinea fowls of eastern Africa, like humans, have multilevel societies. In the past, scientists assumed such social structures required a lot of brainpower. But the pea-brained guinea fowls are revealing the faults in that assumption.

These large birds wander across the landscape in packs, often walking so closely that their bodies touch. They may fight each other to maintain their strict hierarchies, but at other times they engage in friendly behaviours like sharing food.

Suspecting the guinea fowl might have a social structure, Dr. Farine and his colleagues began a thorough study of their society. For a whole year, they made daily observations of 441 birds. Coloured leg bands in unique combinations let researchers tell the black-and-blue birds apart. They also attached GPS devices to the backs of 58 birds, which let them see exactly where every group went, 24 hours a day.

The findings of the research suggest that vulturine guinea fowls have a multilevel society. There are groups within groups within the population as a whole. There even seem to be groups of friends within the small groups. This is the first time anyone has observed such a society in a bird.

And Dr. Farine emphasizes this particular bird’s tiny brain size. “They don’t only have small brains relative to mammals; they also have quite small brains relative to other birds,” he said.

According to him, living in this kind of society might actually make it easier to keep track of the social order. For example, if groups are stable and a bird can identify just one or two individuals within a group, it knows which group it’s looking at — no need for a brain that can recognize every single animal. Multilevel societies also let animals adjust their group sizes based on whatever challenges they’re facing. Depending on what enemies or resources are around, it might make sense to travel in a combined group rather than a smaller one.

“Having a multilevel structure may not require having a large brain,” Dr. Farine said. There may be more birds and other animals out there that, although small-brained, have multilevel societies as our own.

【推荐3】When you were at school, were you ever told to stop daydreaming and concentrate? It was easy for your mind to wander if you weren’t interested in what you were learning or if you had better things to think about. Staying focused can still be a challenge in adult life, but understanding how to do it, and knowing what is distracting you, can help.

Scientists have looked at what makes us delay and found a number of ways to help us stay in the zone. One of the most obvious things is removing noise. Research by Science Focus magazine found silence is best for concentration, or a gentle background hum and coffee shop noise is great! It also found turning off notifications on your phone, or switching it off altogether, removes a major distraction and helps us focus on the task at hand.

Another possible cure for a short attention span is brain training. Psychologists and neuroscientists are increasingly interested in our ability to get down to it and have looked at what we can change inside our head to make us concentrate. An article for BBC Future by Caroline Williams says that “Attention Researcher NilliLavie of University College London has found that making a task more visually demanding takes up more processing power and leaves the brain nothing left to process distractions.” So, keeping your mind busy might be the answer.

There are more practical tips to keeping your mind focused. These include making a list or timetable of the tasks you have to do, finding a workspace where you’re not tempted to do other things, or chewing some gum! It’s possible that the movement in your mouth occupies parts of the brain that might otherwise get distracted.

But according to Science Focus magazine, distraction isn’t all bad. “If we were always so focused that we never got distracted, we’d miss potential changes, such as threats, in our environment. Distraction is vital for survival.”

【推荐1】“I can’t live without my mobile phone!” is what I often hear people say as they talk about how mobiles have become an essential part of their lives.

The all so common sight of heads bent, eyes staring at mobile screens and fingers busy tapping away repeats itself across major cities around the world. Whenever there is a moment to spare while on the train, taxi or waiting in a queue, people busy themselves with their mobile phones.

Some people believe our unhealthy obsession with mobile phones is destroying how we appreciate the little things in life or miss the moments that matter. The truth is that technology overall should be seen as a tool to improve our lives.

Mobile phones have certainly had a great influence on our lives, but I truly believe it’s for the better.

It’s changed the way we communicate, whether for work or play. We are now less constrained (限制) by time and geographical location. With my mobile phone, I can dial into conference calls while stuck in a traffic jam, or reply to urgent e-mails while on the go. I can send a text message or share photos and videos with friends who aren’t living in the same country. My phone calendar keeps my life organized, and even Facebook. Twitter, and instant messaging are now accessible from mobile phones!

The mobile revolution isn’t just changing the lives of urbanite like myself. I know of a young Bangladeshi woman named Shompa Akhter who is crazy about fashion and design. She dreamt about starting her own business and she did just that, opening a shop in Kushtia featuring her own creations. Dealing with suppliers in different towns was a problem for Shompa-purchase orders had to either be hand delivered or mailed out to suppliers. Shompa also found it tough publicizing (宣传) her business to potential customers outside her town. But once she learnt to operate the mobile phone, she was addicted. The 25-year-old businesswoman now stays in touch easily with her suppliers. Mobile e-mail is a blessing in her life. Who would have thought that mobility could bring about such enormous change? It shouldn’t really be a surprise though.

【推荐2】Have you ever shouted at your computer because it wasn’t working? Your computer couldn’t “yell” back – until now. AI researchers are now working on computers that can argue and perhaps even win debates with humans.

IBM scientists published a paper in Nature on March 17 about their new AI system – Project Debater. After listening to arguments from its opponent (对手), the system can search around 400 million online articles in less than five minutes. It looks for ideas that can support its own argument.

Testing on the system began in 2019 when it debated with Harish Natarajan, a professional debater who holds the world record for most debate competition victories. The debate topic was whether or not preschool should be funded, and the AI system argued in favor of this idea. Although the AI lost the debate in the end based on the audience vote, the audience said it did very well. Interestingly, 58 percent of the audience said that Project Debater increased their knowledge about the topic, while only 20 percent said the same about Natarajan. Also, Project Debater has shown strength at making impressive and logical opening statements in the debate, according to Scientific American.

Humans and technology have been battling for decades. In 1997, IBM’s Deep Blue became the first computer to defeat a reigning (卫冕的) chess champion, Garry Kasparov in a six-game match. So after two decades, have IBM’s researchers just reproduced a “Deep Blue” to debate? It’s much more than that, the researchers noted. Argument and debate are fundamental abilities of human intelligence, and it’s a step outside of AI’s comfort zone to enter this field, according to the article in Nature.