Humans have been keeping animals as pets for tens of thousands of years, but Dr Jean-Loup Rault, an animal scientist at the University of Melbourne in Australia, believes new companions are coming: robot pets.

    “Technology is moving very fast,” Rault told ABC News, “The Tamagotchi in the early 1990s was really the first robotic pet, and now Sony and other big companies have improved them a lot.”

    This may not sit well with pet lovers. After all, who would choose a plastic toy over a lovely puppy? But Rault argues that the robotic kind has a lot going for it: “You don't have to feed it, you don't have to walk it, it won't make a mess in your house, and you can go on a holiday without feeling guilty.” The technology also benefits those who are allergic to pets, short on space, or fearful of real animals.

    It's not clear whether robot pets can replace real ones. But studies do suggest that we can bond with these smart machines. People give their cars names and kids give their toy animals life stories. It's the same with robots. When Sony stopped its repair service for its robot dog Aibo in March 2014, owners in Japan held funerals.

    As an animal welfare researcher, Rault is concerned about how robotic pets could affect our attitudes towards live animals. “If we become used to a robotic companion that doesn't need food, water or exercises, perhaps it will change how humans care about other living beings,” he said.

    So are dogs and cats a thing of the past, as Rault predicts? For those who grew up with living and breathing pets, the mechanical kind might not do. But for our next generation who are in constant touch with smart technology, a future in which lovely pets needn't have a heartbeat might not be a far-fetched dream.

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    If you are invited to a wedding, baby shower or other celebrations, you will be expected to bring a gift. Unless you know the host very well, the gift should be modest in value, about $25 or so.

    For a wedding, the bride will have "registered (登记)" at one or two local department stores，indicating the items she prefers. You can buy the couple a gift that isn't listed , but most people buy something listed on the registry (记录簿). If you buy an item listed on the registry, be sure to tell the store that you are doing this, so that the couple doesn't receive duplicate (重复的) gifts. For a baby shower, bring a gift appropriate for a new born baby.

    If you wish to give a gift when you leave to return to your country, the best gift   is something unique to your country. It does not need to be especially valuable or rare. Possibilities include a book about your country, an inexpensive piece of handicraft( 手工艺品)or art, or something else that reflects your culture. If the children collect coins and stamps, they would be very pleased with a set of your country's coins or a selection of stamps from your country.

    If you owe a debt of deep gratitude to an American host family, a common way of repaying it is to take the family to a form of entertainment, such as a baseball, basketball, or a good restaurant.

    Gift giving is not as important in America as it is in other countries, so there is nothing wrong with not giving a gift. If you need help, talk to a salesperson at a department store. Tell them about the person who will be receiving the gift and the reason for the gift, and they will help you find something appropriate.

    Finding a friend doesn't seem like a difficult job. However, bad friends are easier to find than good friends these days. If you're sitting there and wondering if you have a bad friend, let me define it for you.

    A bad friend is someone whose jealousies and insecurities outweigh their love for someone. They might want to be a good friend but they're too messed up in their own head to ever actually do it. They wonder if their friends are going out without them or if they're being forgotten and left behind. People who are violently insecure don't have what it takes to be the quality of a friend.

    Bad friends are narcissistic(自恋的). They look for any opportunity to bring the conversation back to them. Worse, they might not even be aware that they're doing it. In their mind, they might think they are the best friend ever, which is truly frightening.

    Bad friends are quick-change. They're by your side when you're fun and you have something to give them but as soon as you're going through a difficult time, they will become indifferent quickly. They won't bring you cold medicine. They won't give you a ride to the doctor, everything they do is self-serving.

    If you find a friend who has these same characteristics, send them to your bad friend list immediately. Your friends are supposed to be the solution to your problems, not the source.

    I believe your twenties are a time when you need positive and helpful friends. In such a time, friendships aren't easy to maintain like they once were in school. Now we actually have to put work into it, we have to make a conscious effort to keep the friendship going. You need to ask yourself, "Is this person worth it? Do they treat me like a fool or what?" if you have doubts, try to make them clear by considering the past experiences. Toxic(有毒的) friendships do nothing but drag you down. My point is that you have to take care of yourself and stop getting in touch with your bad friends. Only surround yourself with people who bring out the best qualities in you. It may sound cruel but it's true.

    While famous foreign architects are invited to lead the designs of landmark buildings in China such as the new CCTV tower and the National Center for the Performing Arts, many excellent Chinese architects are making great efforts to take the center stage.

    Their efforts have been proven fruitful. Wang Shu, a 49-year-old Chinese architect, won the 2012 Pritzker Architecture Prize—which is often referred to as the Nobel Prize in architecture—on February 28. He is the first Chinese citizen to win this award.

    Wang serves as head of the Architecture Department at the China Academy of Art (CAA). His office is located at the Xiangshan campus (校园) of the university in Hangzhou, Zhejiang Province. Many buildings on the campus are his original creations.

    The style of the campus is quite different from that of most Chinese universities. Many visitors were amazed by the complex architectural space and abundant building types. The curves (曲线) of the buildings perfectly match the rise and fall of hills, forming a unique view.

    Wang collected more than 7 million abandoned bricks of different ages. He asked the workers to use traditional techniques to make the bricks into walls, roofs and corridors. This creation attracted a lot of attention thanks to its mixture of modern and traditional Chinese elements (元素).

    Wang's works show a deep understanding of modern architecture and a good knowledge of traditions. Through such a balance, he had created a new type of Chinese architecture, said Tadao Ando, the winner of the 1995 Pritzker Prize.

    Wang believes traditions should not be sealed in glass boxes at museums. "That is only evidence that traditions once existed," he said.

    "Many Chinese people have a misunderstanding of traditions. They think tradition means old things from the past. In fact, tradition also refers to the things that have been developing and that are still being created," he said.

    "Today, many Chinese people are learning Western styles and theories rather than focusing on Chinese traditions. Many people tend to talk about traditions without knowing what they really are," said Wang.

    The study of traditions should be combined with practice. Otherwise, the recreation of traditions would be artificial and empty, he said.

    Partway through Wonder, Fifth-grader Auggie Pullman finds himself seated across from a new friend in the school cafeteria. "Have you ever thought about having plastic surgery?" the friend asks.

    "Dude, this is after plastic surgery. It takes a lot of work to look this good," Auggie says, running a hand through his hair. In other words, what could be painfully depressing turns out to hold lurking (潜藏的) reserves of humour, which is pretty much the story of Wonder.

    Auggie, played by Jacob Tremblay, was born with a facial difference, and even after multiple operations, his looks shock his classmates. As he adapts from homeschooling to a new school community, he encounters far worse than that lunchtime scene—one nasty bully (横行霸道者) says he'd kill himself if he looked like Auggie—but he never fully loses heart.

    The movie is an adaptation of the 2012 novel by R.J.Palacio, which has sold 6 million copies in North America and launched an antibullying campaign, Choose Kind. Palacio has said she got the idea for the story when her young son began crying at the sight of a girl with a facial difference in an ice cream shop. She took her kids out of the shop, but later regretted her reaction. "What I should have done is simply turned to the little girl and started up a conversation and shown my kids that there was nothing to be afraid of," she said.

    Tremblay, 11, who broke out opposite Brie Larson in the 2015 drama Room, has more than a few things in common with Auggie. "We both love Star Wars, we have awesome families, and we love our dogs." But Tremblay thinks we all can find something in common with the boy. "Everyone's like Auggie in one very important way: we want to be accepted and treated equally and with kindness."

    Julia Roberts, who plays Auggie's mother, became interested in the part because of her own children, "I read it with my kids and fell so in love with it," she says of the novel. "This book is such a beautiful and gentle introduction into all kinds of topics, including bullying and intolerance and fear, and what fear makes young people do sometimes."

    Both actors have some familiarity with the subject. "I was picked on quite a bit as a young person," Roberts says, though she won't say what for. "Even as a 50-year-old mother of three, it's not a path I like to go up and down." Tremblay reveals a bit more. "I have been picked on," he says, "because I'm kind of short for me age. I told my parents, and that's one of the best things you can do, because my mom said would never want me to carry negative thoughts on my shoulders alone."

    The most challenging parts of filming, says Tremblay, were moments in which he had to cry. Tenderhearted audience members will likely shed tears of their own—especially during scenes between Auggie and his mom, who repeatedly reassures her son that he is worthy of love. But the movie also has its fair share of hijinks (喧闹): for every tear-filled moment, there is a lightsaber battle or silly science project to lighten the mood. This mixture of pity and humor, says Roberts, "was intrinsic (固有的) in the writing in the novel." But she credits writer-director Stephen Chbosky with translating that balance into visual terms.

    As much as the movie impresses the viewer with compassion for the underdogs, it also finds a way to sympathize with the bullies. "I would say to try to take a moment to be conscious of why a person that is bullying somebody is behaving that way," says Roberts, "After all", she adds, "There's no child that's born bully."

    Do you suppose Darwin, one of the greatest scientists of all time, really did foolish experiments? Or did he do experiments that were so simple and basic that other people just thought they were foolish?

    Sometimes, people think they already know the answer to a question or the solution to a problem. Sometimes, they really do know an answer or a solution, but without thinking they are important.

    Charles Darwin didn't settle for(满足于) just thinking he knew something. And, he believed all things could be important however simple they seemed to be.

    Suppose you drop sheets of paper that are of exactly the same size and shape. If you drop them at the same time in the same place, they will fall in the same way. Now make one of the sheets of paper into a tight little ball and let it drop along with the other sheets. What happens? You have done an experiment that is so simple that you might think it couldn't be worth anything.

    But this simple experiment is important. It explains part of our present-day understandings of physics, ideas that were worked out long ago by Galileo and Newton. And these understandings set aside some of ancient Greek physics.

    Scientists sometimes stop to look at very simple things and to think very hard about them. Even the simplest idea, which we might think is foolish, can shake the foundations of science.