Sometimes it's necessary to take a break, relax and forget the routine (日常工作), so I know of an excellent place to do it outside the city. It's a beautiful place and I really enjoy going there.

    The name is Tepoztlán, 71 km south of Mexico City. Here you can find a lot of different meals, beautiful landscapes, historical buildings, local souvenirs, and so on.

    The weather most of the time is very hot, and I have to give you some advice if you go.

    I give you this advice because I ended up with sunstroke. I'm going to tell you how my trip started. When we got there we were really starving, so we decided to have breakfast and when we go to Tepoztlan we usually enjoy "quesadillas" in the market.

    In Mexico, it's very common to eat in the market, but these kinds of markets not only sell food but also you can buy clothes, flowers, everything you can imagine.

    Tepoztlan has a lot of tourist sites, but the main attraction is Tepozteco hill, and it's more attractive for the visitors during "Spring Equinox". To be honest, I've never climbed it, I'm too lazy to walk a lot and even more in the sun.

    In my trip we didn't have time to do all that because one day is not enough, but if you have the opportunity to stay for more than one day it's an excellent idea.

    Did you know that the color of uniforms can influence the performance of an athlete? It may sound strange, but a study suggests this might be true.

    Two British scientists studied the results of four sports in the 2004 Athens Olympic Games where the athletes had been given either a red or a blue uniform. They discovered that when there was a big difference in the score, color had no influence on the result. But if it was a close match, the athlete in a red uniform was more likely to win. Then they looked at the uniforms of the soccer teams at the Euro 2004 tournament. Again, teams wearing red won more games.

    The two scientists got their idea from earlier studies of wild animals. It had been discovered that when a male show red on its body, it sends a signal of its power and strength. For example, in many kinds of monkey, the more the male shows off its red scare, the more females it can attract

    Based on this fact, the British scientists thought that the idea might work for humans, too. According to them, when an athlete sees a competitor in a red uniform, he gets a feeling that his competitor could be stronger than him. And that kind of feeling may have a bad influence on the player's performance in the actual game.

    Although the idea is Interesting, most people don't accept that color signals in the animals world can really be useful to humans in sports. They think that it is unreasonable to develop an Idea based on such a small number of examples. Much more research has to be done to prove the influence of uniform colors on the performance of athletes.

    Teens don't understand the big fuss (小题大做). As the first generation to grow up in a wired world they hardly know a time when computers weren't around, and they eagerly catch the chance to spend hours online, chatting with friends, so what?

    But researchers nationwide are increasingly worried that teens are becoming isolated, less skillful at person-to-per son relationships, and perhaps numb to the cheatings that are so much a part of the e-mail world. "And a teen's sense of self and values may be changed in a world where personal connections can be limitless," said Shetty Turkle.

    Another researcher, Robert Kraut, said he's worried about the "opportunity costs" of so much online time for youths. He found that teens who used computers, even just a few hours a week, showed increased signs of loneliness and social isolation. "Chatting online may be better than watching television, but it's worse than hanging out with real friends," he said.

    Today's teens, however, don't see anything strange in the fact that the computer takes up a central place in their social lives. "School is busy and full of pressure. There's almost no time to just hang out," said Parker Rice, 17 "Talking online is just to catch time."

    Teens say they feel good about what they say online or taking the lime to think about a reply. Some teens admit that asking someone for a date, or breaking up, can be easier in message form, though they don't want to do so. But they insist there's no harm.

    As businesses and governments have struggled to understand the so-called millennials—born between roughly 1980 and 2000—one frequent conclusion has been that they have a unique love of cities. A deep-seated preference for night life and subways, the thinking goes, has driven the revitalization of urban cores across the U.S. over the last decade-plus.

    But there's mounting evidence that millennials' love of cities was a passing fling(放纵). Millennials don't love cities any more than previous generations.

    The latest argument comes from Dowell Myers, an urban planning professor at USC. As they age, says Myers, millennials' presence in cities, will "be evaporating(蒸发) through our fingers, if we don't make some plans now." That's because millennials' preference for cities will fade as they start families and become more established in their careers.

    It's about more than aging, though. Demographer William Frey has been arguing for years that millennials have become stuck in cities by the 2008 downturn and the following slow recovery, with poor job prospects and declining wages making it harder for them to afford to buy homes in suburbia.

    Myers, too, says observers have confused young people's presence in cities with a preference for cities. Survey data shows that more millennials would like to be living in the suburbs than actually are. But the normal career and family cycles moving young people from cities into suburban houses have become, in Myers' words, "a plugged up drain."

    But unemployment has finally returned to healthy lows (though participation rates and wages are still largely stagnant), which Myers says should finally increase mobility for millennials.

    Other trends among millennials, supposedly matters of lifestyle preference, have already turned out to have been driven mostly by economics. What was once deemed their broad preference for public transit may have always been a now-reversing inability to afford cars. Even decades-long trends towards marrying later have been accentuated as today's young people struggle for financial stability.

    Investors are already taking the idea that millennials will return to old behavior patterns seriously, putting more money into auto manufacturers and developers. But urban lifestyles, up to and including trendy bars, aren't just hip—they're a part of what powers a city's economic engines, bringing people together to explore new ideas, create companies, and build careers.

    From the 1960s to the 1990s, we saw that suburbanization(城市郊区化)also means an economic and social hollowing out for cities. Now that the economic shackles are coming off today's young city residents, cities that want to stay vibrant(充满生机的) have to figure out how to convince them—and their growing families—to stick around.

    Mandara seemed to know something big was about to happen. So she let out a yell, caught hold of her 2-year-old daughter Kibibi and climbed up into a tree. She lives at the National Zoo in Washington D. C.

    And on Tuesday, August 23rd, witnesses said she seemed to sense the big earthquake that shook much of the East Coast before any humans knew what was going on. And she's not the only one. In the moments before the quake, an orangutan（猩猩）let out a loud call and then climbed to the top of her shelter.

    “It's very different from their normal call,” said Brandie Smith, the zookeeper. “The lemurs（monkeylike animals of Madagascar）will sound an alarm if they see or hear something highly unusual.”

    But you can't see or hear an earthquake 15 minutes before it happens, can you? Maybe you can—if you're an animal. “Animals can hear above and below our range of hearing,” said Brandie Smith. “That's part of their special abilities. They're more sensitive to the environment, which is how they survive.”

    Primates weren't the only animals that seemed to sense the quake before it happened. One of the elephants made a warning sound. And a huge lizard（蜥蜴）ran quickly for cover. The flamingoes（a kind of birds）gathered before the quake and stayed together until the shaking stopped.

    So what kind of vibrations（震动）were the animals picking up in the moments before the quake? Scientist Susan Hough said earthquakes produce two types of waves—a weak “P” wave and then a much stronger “S” wave. The “P” stands for “primary”. And the “S” stands for “secondary”. She thinks the “P” wave might be what sets the animals off.

    Not all the animals behaved unusually before the quake. For example, Smith said the zoo's giant pandas didn't jump up until the shaking actually began. But many of the other animals seemed to know something was coming before it happened. “I'm not surprised at all,” Smith said.

    Across Europe, where visitors can outnumber residents in the summer months, the complaints have started. Last week, in Barcelona, an open-top bus was spray-painted across its windscreen with the words “Tourism Kills Neighbourhoods”. The message is clear: such cities are under pressure. In tourists and residents' battle for shared spaces, local authorities are uncomfortably in the middle. The tourism is one of the largest employers in the world, with one new job created for every 30 new visitors to a destination—but at what cost to locals' quality of life?

    More people are travelling than ever before, and lower barriers to entry and falling costs mean they are doing so for shorter periods. The rise of “city breaks”—48-hour bursts of foreign cultures—has increased tourist numbers. “Too many people do the same thing at the exact same time,” says Xavier Font, a professor at the University of Surrey, “For locals, the city no longer belongs to them.”

    Compounding the problem is Airbnb, which has made tourists more casual in their approach to international travel, but added to residents' headaches. Those permanent citizens who share their apartment blocks with Airbnb hosts have lost their patience, “No longer do we have to share the streets with tourists, we have to share our own buildings!” To ease the congestion around the main attractions, many cities are taking immediate action. Venice is proposing a new concept of “detourism”: sustainable travel tips and alternative routes for exploring a different Venice. A greater variety of guidance for future visitors—ideas for what to do in off-peak seasons, for example, —can guide them from overcrowded landmarks. Repeat visitors have a better sense of the culture and it is much easier to integrate their behaviour with residents of the cities.

    “But the locals should learn to take tourists as a part of urban life. Tourists do not have to be considered passive players, but rather as visitors with rights and duties,” says Font, “Everyone has a part to play in promoting that change.”