With the Chinese language growing in popularity,the UK government plans to invest（投资）10 million pounds to help more kids learn Mandarin（普通话）.Do you think it is necessary for the UK pupils to learn Mandarin?Some people share their opinions online.

    Ted(UK): The learning of any language can be valuable and rewarding,but it is not suitable for everyone. Chinese is a difficult language to learn and the UK has a poor reputation for teaching foreign languages.Why should they learn Chinese when most people in the world speak English?

    Mark(US): I studied French for 2 years in high school and German for 4 years in college.I studied Mandarin informally for about 4 months before moving to China.Now I speak Mandarin every day as my wife doesn't speak English.But it is far from being fluent.Learning additional languages is a great thing,which offers a different perspective on the world around us.Nowadays,it's almost necessary to be able to speak more than just your native tongue.

    George(UK): No,unless they're taught from a very early stage of childhood.Mandarin is so difficult.If China really is going to dominate the world,it'll have to do so by speaking the world's dominant language—English.

    Sam(UK): I don't think Chinese will become as widely spoken throughout the world as English.It is too difficult to learn as a second language.To learn Chinese you completely have to devote yourself to learning how to write and read it.If you have to learn it besides other subjects you can't be good at it.But Chinese will become more popular, and that is a good thing.

    Robots make me nervous—especially the ones which seem to think for themselves. I was embarrassed to admit this till I heard that Bill Gates, the founder of Microsoft, felt the same way.

    Gates said in an interview with the social networking and news website Reddit: "I am in the camp that is concerned about super intelligence. First the machines will do a lot of jobs for us and not be super intelligent．That should be positive if we manage well. A few decades after that, though, the intelligence is strong enough to be a concern."

    Well, maybe I don't have to worry about my computer and kitchen equipment yet. After I use them I can always pull the plug. But in the future, machines might find a way to prevent us from switching them off. There's a terrible thought!

    Maybe the problem with computers too clever for us is not that they are evil like some we've seen in sci-fi movies. What could put us in danger is that they might be too efficient. That's what philosopher Nick Bostrom from Oxford University believes. He says that machines are indifferent to humans and in pursuit of their own goals，the destruction of people might be just additional damage. Bostrom gives us an example: A machine which might have its only goal to produce as many paperclips as possible might look at human bodies as extra material for paperclips and go after you. Because it is, well, a machine, it would not take pity on you.

    It's a good thing that American writer Isaac Asimov thought about how far robots can go and left us his three rules of robotics. They state that a robot may not hurt a human being or allow the human being to come to harm.

    I'm glad my machines at home are "dumb". All my cleaner wants to take over is the carpet in my living room. Let's hope they don't create an appliance which wants to take over the world!

    The term "smiling depression" —appearing happy to others while actually suffering depressive symptoms—has become increasingly popular. In fact, many people who experience a low mood and a loss of pleasure in activities manage to hide their condition in this way. And these people might be particularly easy to suicide.

    While smiling depression is not a technical term that psychologists use，it is certain to be depressed and manage to successfully mask the symptoms. The closest technical term for this condition is "atypical depression: It can be very hard to spot people suffering depression because they may seem like they don't have a reason to be sad — they have a job, an apartment and maybe even children or a partner. They smile when you greet them and can carry pleasant conversations. In short, they often put on a mask to the outside world while leading seemingly normal and active lives. Inside, however, they often feel hopeless and down, sometimes even having thoughts about ending it all.

    People with smiling depression put on a happy face to the outside world, but they can experience a lift in their mood as a result of positive occurrences in their lives. Other symptoms of this condition include overeating, feeling a sense of heaviness in the arms and legs and being easily hurt by criticism or rejection. They are also more likely to feel depressed in the evening and feel the need to sleep longer than usual. With other forms of depression, however, your mood might be worse in the morning and you might feel the need for less sleep than you are normally used to.

    So how can they break this circle? A starting point needs to be known that this condition actually exists and that it's serious. Only when we stop ignoring our problems because we think they're not serious enough can we start making an actual difference. Then we can find purpose by taking the attention away from ourselves and placing it onto something else. Feeling that our lives matter is finally what gives us purpose and meaning — and this can make a significant difference for our mental health and well-being.

    I have a story about raising free-range (自由放养) kids. This past Columbus Day, my husband and I went fishing with some friends on their boat while our10 and 8-year-old kids were in school. We left the house all at the same time, about 7 a. m. My children walked to and from school every day and we knew they would be OK for a couple hours by themselves anyway. We told them to go home after school and we would be home around 4 p. m.

    We live on the Gulf Coast, and since it was a beautiful day, all of the adults decided to go fishing off-shore. At around 2 p. m. after a good harvest from the sea, we started back to the shore and unfortunately after some time, we ran out of gas. We were out of cellphone service, and what was even worse was that 911 wasn't working. We didn't have a radio either. Therefore, we were stuck waiting for someone to pass by. We were out there until 10 p. m. All the while my children were at home, expecting us to return shortly after they got home. At about 7 p. m. , when it was getting dark, my 10-year-old daughter thought something might be wrong so she walked to each house on the street until someone answered the door and asked the person what they should do. This was how we were finally found by the game warden (管理员) on the coast and "rescued".

    Talking with that neighbor the next day, I was never so proud of my children. This neighbour explained to me, "What calmness both of your children showed when explaining the situation and how impressed I was with your children seeking help, even though they didn't know me." I never doubted him for a minute, though next time we go fishing we'll monitor the gas more carefully.

I will never forget the year 1979. I was just ten years old when my father decided to take me to see a stunt (特技) show starring the famous motorcyclist, Evel Knievel. After seeing the amazing stunts, I started dreaming about riding bikes and performing stunts myself one day.

My whole childhood was spent at skate parks; there was a group of us that would go there every day after school with our BMX bikes (a type of bicycle designed to ride on rough ground). After all, I would need to get some practice if I was going to be like my hero!

My later teenage years were spent competing in endless BMX freestyling championships; some I won and others I lost. But it was never about the trophies (奖杯). The atmosphere was magical, with over 1,000 riders at some events. I just loved the rush of energy I got from this, and from continuously trying newer, more daring stunts.

In 1995, I was chosen to compete in an important international action sports competition. For once in my life I was nervous. I landed badly on my hand and got injured. It took me out of the sport for a while, but my attitude was: "If others have suffered more and gone on, then why can't I?" I had once read that Evel Knievel suffered a total of thirty­five broken bones.

When the International Olympic Committee made BMX an Olympic sport, I couldn't have been more delighted! The way I see it, the sport finally got the recognition it deserved. Its entry into the Olympics encourages more people to take it up seriously.

I have heard some people say that BMX is too dangerous for kids. The risks, though, are really no greater than, say skateboarding. With riders pushing the limits far beyond what I could ever have imagined when I first started riding professionally, BMX seems set to remain one of the most exciting sports in history.

Richard Holmes, a British author and academic, is something of a Romantic, famous for biographies of Percy Bysshe Shelley and Samuel Taylor Coleridge. In his last book, "The Age of Wonder", he wrote about science and Romanticism and their common commitment to discovery. In his new book, "Falling Upwards", he combines the two again to tell the stories of Europe's early balloonists (气球飞行者).

Mr Holmes's love of balloons was aroused at a village festival and his enthusiasm is one of the book's many pleasures. He refers to the cheerful tone used in many first-hand ballooning stories, and applies it in this second-hand account. He describes men and women wrapped up in fur coats under their hydrogen-filled balloons, enjoying cold chicken and champagne and looking back to earth to see mankind "for what it really is."

Mr Holmes makes much of the strange side of ballooning, but the book is at its best when examining its more serious applications. In the American civil war, for example, both North and South put observers in balloons to spy on enemy movements. And during the Prussian attack on Paris in 1870-71， balloonists managed to fly out of the city to communicate with the French government in exile (流亡) in Tours.

"Falling Upwards" contains much of the historian's writing characteristics, such as footnotes and bibliography (文献书目), but its epilogue (后记) refers modestly to what has gone before as "a series of true balloon stories". It does touch on the more technical aspects of ballooning, and says little about the French Montgolfier brothers who are credited as its inventors. That though seems a small price to pay for such a spirited work. Mr Holmes's tale ends at the start of the 20th century when the business of flight was being handed over to the airship and the airplane.