It's a popular belief that a fish's memory lasts for only seven seconds. It may seem sad to think that they don't remember what they've eaten or where they've been, and they don't recognize you or any of their friends — every moment in their life would be like seeing the world for the first time.

    But don't be so quick to feel sorry for them. A new study has found that fish have a much better memory than we used to think. In fact, certain species of fish can even remember events from as long as 12 days ago.

    In the study, researchers from MacEwan University in Canada trained a kind of fish called African cichlids to go to a certain area of their tank to get food. They then waited for 12 days before putting them back in the tank again.

    Researchers used computer software to monitor the fish's movements. They found that after such a long break the fish still went to the same place where they first got food. This suggested that they could remember their past experiences.

    In fact, scientists had been thinking for a long time that African cichlids might have a good memory. An earlier study showed that they behaved aggressively（挑衅地） in front of certain fish, perhaps because they remembered their past “fights”. But until the latest findings, there was no clear evidence.

    Just as a good memory can make our lives easier, it also plays an important part when a fish is trying to survive in the wild.

    “If fish are able to remember that a certain area contains safe food, they will be able to go back to that area without putting their lives at risks,” lead researcher Trevor Hamilton told Live Science.

    For a long time, fish were placed far below chimpanzees, dolphins and mice on the list of smart animals. But this study has given scientists a new understanding of their intelligence.

    If you don't think technology can improve your trip better, meet Judy. When she recently checked into the Biu Hotel in Zurich, a clerk asked her to pay hundreds of dollars higher than the online offer. It was not a cheap stay, but it became more of one after she fired up the Booking. Com app she'd used to purchase her room on her smartphone. “As soon as I showed him the rate, he honored it,” Judy says.

    Technology may create challenges for travelers-indeed, it may have led to Judy's rate confusion in the first place-but it can also solve them. The solutions go beyond making sure of a hotel rate. The latest version of Booking.com is among the most feature-rich booking programs. Users can select hotels by location, make a secure booking and view the confirmed rate.

    Another pain point for travelers is traffic that eats away precious vacation time. There's a new app for that, called Commute. As the name implies, it's aimed at users who have to make the same trip every day. Just input basic information about your destination and expected leaving time, and the app will start sending you traffic data 15 minutes before you leave.

    Another source of travel-related conflict and confusion is money. That's particularly true when you're dealing with a foreign currency. The latest version of Travel Money Tracker helps travelers prevent currency mix-ups. It instantly converts(兑换) a country's native currency to yours, so you know exactly how much that Espresso(浓咖啡) in Milan costs in dollars. One extra feature is the ability to set up an alert that tells you when you're overspending, which can sometimes be a problem when you're on vacation. The only catch, of course, is that you have to remember to record all your purchases.

    Tone of voice is very important in human conversation. A person might use words that communicate one message and a tone that shows something very different. This possibility for confusion is one reason that businessmen encourage discussing things in person, rather than through email, as tone cannot be determined in the written form.

    The same rule is true with children. Children as young as a few months respond to a change in voice. It has been recorded that babies prefer to hear a story read by their own mother rather than another woman whom they do not know.

    Have you ever talked to someone who had little or no changes in their voice no matter what you were discussing? Think of the teacher or professor you had in the past that spoke in a monotone manner for the entirelecture. It is very boring and difficult to become interested in the topic.

    Parents should make an active effort to communicate with your child. If your child figures out how to open a box he or she has been struggling with and says “YES!” with pride in his or her voice, your response should be happy and excited (something encouraging, like “You did it!”). If you plainly said the same thing, you would not be matching the tone of your child.

    This applies to feelings that the child may express in everyday situations as well. If a child argues with a friend, your response should not be said in a high voice or with a smile. Seriously and sincerely you should say “You look sad” or “That must have been hard for you”.

    The tone of your voice expresses understanding, acknowledgement, connection and several other healthy things to your child. Although your words are very important, equally important is the tone with which you say those words.

    When I walked into the house after school, I found my dad at home.

    "What are you doing home already?" I asked casually.

    "Andrew, I was laid off today," he answered quietly.

    I was sure he was joking. "No, you weren't. Why are you really home?"

    Then I noticed his expression and realized he was telling the truth. My father has always been a hard worker and prided himself on his career. My father's unemployment created many changes in our lives. He was home all day, which meant my bed had to be made, my room cleaned up, and my homework done right after school. I would come home every day to find him at the computer searching for jobs. I began to notice how down he seemed, and how losing his job had affected his self-esteem, though he tried to be optimistic. He asked my brother and me to spend less money. I gave up my allowance, which even though it wasn't much, felt like the right thing to do. I also found a part-time job.

    After several difficult months of searching, my dad decided to go in a totally different direction. He explained that he never wanted to be laid off again, so he was going to start his own business. Day by day, I watched him build it, and I admired how much time and energy he devoted to it.

    One evening I asked if he needed help. "Only if it doesn't interfere（打扰，妨碍） with school," he said, which sounded like a yes.

    I showed up at his office the next afternoon, and most afternoons after that for two months. I always knew he was a hard worker, but watching him in action really influenced me. Although this was one of the worst experiences for our family, it taught me a lot about dealing with adversity. Now I know that through creative problem-solving, I can always find Plans, ask for help, and take risks.

    One of the latest trends（趋势） in American Childcare is Chinese au pairs. Au Pair in Stamford, Conn, for example, has got increasing numbers of request for Chinese au pairs from aero to around 4, 000 since 2004. And that's true all across the country.

    “I thought it would be useful for him to learn Chinese at an early age” Joseph Stocke, the managing director of a company, says of his 2-year old son. “I would at least like to give him the chance to use the language in the future, ” After only six months of being cared by 25-year-old woman from China, the boy can already understand basic Chinese daily expressions, his dad says.

    Li Drake, a Chinese native raising two children in Minnesota with an American husband, had another reason for looking for an au pair from China. She didn't want her children to miss out on their roots. ” Because I am Chinese, my husband and I wanted the children to keep exposed to(接触) the language and culture. ” she says.

    “Staying with a native speaker is better for children than simply sitting in a classroom,” says Suzanne Flynn, a professor in language education of Children. ”But parents must understand that just one year with au pair is unlikely to produce wonders. Complete mastery demands continued learning until the age of 10 or 12. ”

    The popularity if au pairs from China has been strengthened by the increasing numbers of American parents who want their children who want their children to learn Chinese. It is expected that American demand for au pairs will continue to rise in the next few years.

    God has a way of allowing us to be in the right place at the right time.

    I was walking down a dark street late one evening when I heard screams coming from behind a clump of bushes (灌木). Alarmed, I slowed down to listen and soon realized that what I was hearing was the unmistakable sounds of a struggle: mad fighting and tearing of clothes.

    Only yards from where I stood a girl was being attacked. Should I get involved? I was worried about my own safety, and regretted having suddenly decided to take a new route home that night. What if I became another victim? Shouldn't I just run to the nearest phone and call the police?

    The girl's cries were growing weaker. I knew I had to act at once. How could I walk away from this? I finally made up my mind. I could not turn my back on the fate of this unknown girl, even if it meant risking my own life.

    I am not a brave man, nor am I physically strong. I didn't know where I got the courage and strength, but once I had decided to help the girl, I became strangely different. I ran behind the bushes and pulled the attacker off the girl. Struggling, we fell to the ground, where we wrestled for a few minutes until the attacker jumped up and escaped.

    Out of breath, I stood up and approached the girl, who was behind a tree, sobbing. Not wanting to frighten her further, I at first spoke to her from a distance. "It's okay," I said softly. "The man has run away. You're safe now." There was a long pause and then I heard the words, spoken in wonder, in amazement. "Dad, is that you?" And then, from behind the tree, out stepped my youngest daughter, Katherine.