A team of engineers at Harvard University has been inspired by Nature to create the first robotic fly. The mechanical fly has become a platform for a series of new high-tech integrated systems. Designed to do what a fly does naturally, the tiny machine is the size of a fat housefly. Its mini wings allow it to stay in the air and perform controlled flight tasks.

    “It's extremely important for us to think about this as a whole system and not just the sum of a bunch of individual components (元件),” said Robert Wood, the Harvard engineering professor who has been working on the robotic fly project for over a decade. A few years ago, his team got the go-ahead to start piecing together the components. “The added difficulty with a project like this is that actually none of those components are off the shelf and so we have to develop them all on our own,” he said.

    They engineered a series of systems to start and drive the robotic fly. “The seemingly simple system which just moves the wings has a number of interdependencies on the individual components, each of which individually has to perform well, but then has to be matched well to everything it's connected to,” said Wood. The flight device was built into a set of power, computation, sensing and control systems. Wood says the success of the project proves that the flying robot with these tiny components can be built and manufactured.

    While this first robotic flyer is linked to a small, off-board power source, the goal is eventually to equip it with a built-in power source, so that it might someday perform data-gathering work at rescue sites, in farmers' fields or on the battlefield. “Basically it should be able to take off, land and fly around,” he said.

    Wood says the design offers a new way to study flight mechanics and control at insect-scale. Yet, the power, sensing and computation technologies on board could have much broader applications. “You can start thinking about using them to answer open scientific questions, you know, to study biology in ways that would be difficult with the animals, but using these robots instead,” he said. “So there are a lot of technologies and open interesting scientific questions that are really what drives us on a day to day basis.”

Building Trust in a Relationship Again

    Trust is a learned behavior that we gain from past experiences. {#blank#}1{#/blank#} Trust is a risk. But you can't be successful when there's a lack of trust in a relationship that results from an action where the wrongdoer takes no responsibility to fix the mistake.

    Unfortunately，we've all been victims of betrayal. Whether we've been stolen from，lied to，misled，or cheated on，there are different levels of losing trust. Sometimes people simply can't trust anymore. {#blank#}2{#/blank#} It's understandable，but if you're willing to build trust in a relationship again，we have some steps you can take to get you there.

    {#blank#}3{#/blank#} Having confidence in yourself will help you make better choices because you can see what the best outcomewould be for your well-being.

    {#blank#}4{#/blank#} If you've been betrayed，you are the victim of your circumstance. But there's a difference between being a victim and living with a “victim mentality”. At some point in all of our lives，we'll have our trust tested or violated.

    You didn't lose “everything”. Once trust is lost，what is left? Instead of looking at the situation from this hopeless angle，look at everything you still have and be thankful for all of the good in your life. {#blank#}5{#/blank#} Instead，it's a healthy way to work through the experience to allow room余地 for positive growth and forgiveness.

A. Learn to really trust yourself.

B. It is putting confidence in someone .

C. Stop regarding yourself as the victim.

D. Remember that you can expect the best in return.

E. They've been too badly hurt and they can't bear to let it happen again. .

F. This knowledge carries over in their attitude toward their future relationships.

G. Seeing the positive side of things doesn't mean you're ignoring what happened.

HEARST CASTLE, CA

    Hearst Castle is open for tours daily, except Thanksgiving, Christmas and New Year's Day.

Tour A — The Grand Rooms

    View the ground floor rooms of La Casa Grande where Mr. Hearst's guests met their host and were entertained during their stay. See the Assembly Room, where guests met for cocktails, the Refectory, where meals were served, the Morning Room, Billiard Theater. Your knowledgeable guide will bring this big house to life sharing stories about Mr. Hearst, his many guests, and the art collection it contains.

Prices: Adults: $25.00; Children: $12.00.

Tour B—The Upstairs Suites (套房)

    This tour features rooms on the upper floors of Casa Grande. Travel through guest suites on your way to the Library where Mr. Hearst housed a collection of 2,000-year-old Greek pots. Visit Mr. Hearst's private third floor suite including his bedroom and private study where he held business meetings. Learn about the genius of architect Julia Morgan and the way she put Mr. Hearst's art collection into the design.

Prices: Adults: $20.00; Children: $10.00.

Tour C—Evening Tour

    This tour allows visitors to experience the Castle at night as a visitor to the Castle in the 1930s might have. It features highlights from the experience, Upper Floors of Casa Grande, and Garden tours.

Evening tours are offered on most Fridays and Saturdays during March—May & October — December.

Prices: Adults: $36.00; Children: $18.00.

Tour D—Accessible Holiday Twilight

    This tour is wheelchair accessible. Visitors who have difficulty climbing stairs, or who cannot stand or walk for extended period, may also benefit from this tour. Accessible transportation is provided from the Visitor Center to all areas of the Holiday at Hearst Castle tour. Call 866-712-2286 for additional information.

Prices: Adults: $30.00; Children: $15.00.

    How can you gain knowledge of the world without books or teachers? Visiting various kinds of world-famous museums may be your best choice. If you are interested ，here are 3 famous museums well worth visiting.
National Gallery, London 2017 attendance: 6,263,000

    The National Gallery originally opened in 1824 in a Pall Mall townhouse with just 38paintings. Today's collection contains over 2, 300 works from the 13th to 19th centuries, which you can appreciate free of charge. The works range in style and time period, but hey, everyone needs to see Van Gogh's Sunflowers in Room 43 at least once, for which the Museum is famous.

    Opening time: daily 10 am—6 pm Friday 10 am—9 pm

    Closed time: January and 24—26 December

    Admission: Free
National Air and Space Museum, Washington, D. C.

    2017 attendance: 7,500,000

    The National Air and Space Museum, part of the Smithsonian Institution, hosts the world's largest collection of aviation and space artifacts. You'll see crowds flocking toward the 1903Wright Flyer and Apollo 11command module, but don't forget about NASA's often—overlooked Stardust probe.

    Hours and Admission :Open every day except December 25.

    Free admission and tickets (free) are needed.

    ⒈A maximum of 4000 free tickets will be issued each day at the museum.

    ⒉Each visitor can once collect one free ticket of the day with valid ID (Passport ).

    Regular Hours :10:00 am to 5:30 pm

    Extended Hours :10:00 am to 7:30pm Fridays, Saturdays and Sundays

National Museum of China, Beijing

    2017 attendance: 7,550,000

    Founded in February 2003, this huge, well-curated museum sits on the edge of Beijing's Tiananmen Square and is free to enter. It houses more than 1.3 million exhibition pieces in its 40halls ，focused primarily on China's achievements in history, culture, and art.

    Opening Hours :9 :00—17:00

    (No Entry after 16:00) Closed on Mondays

    Museum Visiting Tips: Limit the number of bags( only one handbag is allowed ). All visitors are screened through metal detector upon entry. The fewer items you bring inside the Museum. Before you visit, please review the list of prohibited items, Visitors carrying prohibited items will not be allowed inside the Museum, s0 please leave them at home or in your car.

    No Food or Drink: Only bottled water is permitted in the Museum

    Your kids learn a lot from their friends—things you can't teach them, no matter how much you want to.

    Probably the most important thing kids learn is how to have peer relationships. As a parent, you can't do this, because you and your child aren't equals.

    For example, when you're sitting on your family room floor and your very young child asks you to pass him the blocks, you probably hand them right over. If your child is sitting with a peer and asks the same thing, though, he might not get what he wants.

    To succeed, your child will need to learn strategies for getting what he wants. For example, he might simply yank (猛拉) the toy out of his friend's hand. If he does that, he may learn that it's not the best way of getting what he wants because it leads to fighting and time­outs. The successful child will learn that he needs to negotiate a trade, to wait patiently, or to find something else equally fun to play with.

    Friends also provide emotional support, something that is part of the foundation of healthy adulthood. You can't be with your child on the elementary school playground or at the high school dance. Your child's friends will be the ones to stick up for her, to include her in games, and later, to tell her she looks great even if her lousy prom (糟糕的舞会) date wanders off instead of dancing with her.

    Friends also help your children learn. Friends solve problems together, imitate each other, and pass on knowledge.

    Some experts believe that the single biggest predictor of your child's success later in life is her ability to make friends. In fact, they claim it's even more important than IQ and grades.

    This doesn't mean that the kids who are most popular in school do the best later on in life. What matters is not the number of friends a child has but rather the quality of the relationships.

    This is good news for those of us who hate to think that popularity really is the Holy Grail of childhood and adolescence. While it's true that popularity has many advantages, and that many popular kids really are nice people—and not just the best dressed or best looking—it's better to have a few good friends than to have the admiration of the masses.

Everyone wants to be happy, but sometimes it can be difficult to feel happiness. That's because we have misunderstandings (误区) about happiness that can get in the way. The good news is that changing the way you think about happiness can help you to feel more joy each day.

Dr. Williamson from the charity Action for Happiness says, "Happiness is not about denying (拒绝承认) terrible feelings or being joyful all the time. It's about making the most of good times and learning to deal with bad times". Dr. Green believes that happiness comes when we feel good about who we ate and where our life is going.

Noticing when you feel happy and what you're doing or what's happening at that time can help you to find more happiness. For example, you may realize that working out a difficult puzzle makes you feel better than watching a favorite TV show. What helps you to feel happy might be different from what makes someone else happy.

Start a list of things that make you happy and keep adding to it as you discover new ones. Make time to do what you know makes you happy and remember that joy isn't only found in what you do for yourself—being kind and thoughtful to other people helps you feel happier, too.

There are misunderstandings that can make it hard to feel happy. One is that it's selfish (自私的) to be happy when other people are sad. However, stopping yourself from being happy doesn't make other people less sad. In fact, research has shown that happy people spread happiness to others. Another thing is thinking that you need lots of money and things to be happy. Studies have shown that when people win the lottery (彩票), they feel a short burst of happiness but they soon return to feeling the same as they did before they won. So it's important to notice the simple things that make you feel happy.