On a hill 600 feet above the surrounding land, we watch the lines of rain move across the scene, the moon rise over the hills, and the stars appear in the sky. The views invite a long look from a comfortable chair in front of the wooden house.

    Every window in our wooden house has a view, and the forest and lakes seldom look the same as the hour before. Each look reminds us where we are.

    There is space for our three boys to play outside, to shoot arrows, collect tree seeds, build earth houses and climb trees.

    Our kids have learned the names of the trees, and with the names have come familiarity and appreciation. As they tell all who show even a passing interest, maple（枫树）makes the best fighting sticks and white pines are the best climbing trees.

    The air is clean and fresh. The water from the well has a pleasant taste, and it is perhaps the healthiest water our kids will ever drink. Though they have one glass a day of juice and the rest is water, they never say anything against that.

    The seasons change just outside the door. We watch the maples turn every shade of yellow and red in the fall and note the poplars'（杨树）putting out the first green leaves of spring. The rainbow smelt fills the local steam as the ice gradually disappears, and the wood frogs start to sing in pools after being frozen for the winter. A family of birds rules our skies and flies over the lake.

    As for old people, some of the applications are hard to use because they didn't grow up with them. They don't have simple models of how they should work, what to do when something doesn't work or where to go for help. We make it as easy as possible to be used for people who are not familiar with the technology.

    I think there is huge potential and we are designing it. The ability to connect to friends, who remember the same movies and news and music, is really important, especially as people get old. They end up in retirement homes and they aren't always close to their friends. Allowing the network to help them connect with friends and family is a really powerful thing.

    My mother is an enthusiastic user of the Internet，although it took me years to get her to use e-mail. She was born with normal hearing, but lost it when she was 3.She was totally deaf for many years, until age 53, when she got ear aids. They work really well. That is a big change for her. But before then, her friends couldn't call her on the phone, so they insisted she use e-mail to communicate with them.

    Young people don't even think of the Internet as technology. It's just there, and they use it. There's been a very interesting change in communications styles between old people and young people. There are some kids who are now in their teens and aren't willing to make phone calls. And they think of e-mail as old-fashioned and slow.

    The reason why teens don't make phone calls seems to be that they don't know what to say. When they call they often stop for a while. They don't know what to say，and there's this silence. On the other hand, texting is considered proper, and it's okay if you don't answer. You might have been distracted. It's not considered rude. But it is considered strange if you're in this kind of voice conversation and simply stop talking.

SECONDARY PROGRAMS & RESOURCES

    Companion planting is the idea that some kinds of plants can help each other grow. Plants that are compatible (兼容的，能共处的) together generally have similar needs in terms of nutrients, soil and moisture levels.

    Advice about which plants are compatible is sometimes based more on tradition than proof. But experts say there is evidence to support certain combinations. These can improve harvests, reduce disease and help with pest control by attracting helpful insects.

    For example, some kinds of soil bacteria take nitrogen from the air and make it into a form that plants can use. The plants hold the nitrogen in their roots. Legumes (豆科植物) are especially good at this nitrogen (氮) fixing. Then any crops that share the same space with the legumes can get the nitrogen when the roots are broken down.

    Beans and potatoes can also share territory well because their roots reach different levels in the soil. Deep-rooted vegetables get nutrients and moisture from lower down in the soil, so they do not complete with plants with shallower roots.

    But some plants placed together may harm each other's development. For example, tomatoes do not like wet soil but watercress does, so you would probably want to keep them separated.

    Some kinds of produce should be kept apart even after being harvested. This is because of ethylene gas (乙烯气体). Ethylene is a plant hormone (激素) that can cause some foods to ripen too quickly. Apples release ethylene gas. Apricots, melons and tomatoes also release a lot of ethylene. Some vegetables are easily affected by ethylene, including asparagus, broccoli, cabbage and cucumbers.

    This risk of ripening too soon is why markets often separate high ethylene-producing foods from those that are sensitive to the gas. But if you put an apple in a bag with a green banana, the ethylene from the apple will make the banana ready to eat sooner.

    What about peaches, plums and nectarines? These kinds of fruit do not need any help from an apple—they release enough ethylene to ripen themselves. But that does not mean there is no way to get the job done faster.

    Growers suggest placing the fruit in a fruit bowl or in a paper bag with the top folded over. Keep the fruit at room temperature, out of direct sunlight. Once the fruit is soft enough, either use it or put it in the refrigerator to keep it from getting too ripe.

    Social media (社交媒体)is one of the fastest-growing industries in today's world. A study conducted by the US think tank (智囊团) Pew Research Center showed that 92 percent of teenagers go online daily.

    The wide spread of social media has changed nearly all parts of teenagers' lives.

    ●Changing relationships

    High school student Elly Cooper from Illinois said social media often reduces face-to-face communication.

    "It makes in-person relationships harder because people give attention to their phones instead of their boyfriends or girlfriends," Cooper said.

    There's also a greater possibility of things getting lost in translation over social media.

    "If half of your relationship is over social media, you don't really know how the other person is reacting," Sienna Schulte, a junior student from Illinois, said.

    Yet, some people believe social media has made it easier to start relationships with anyone from anywhere. Beth Kaplan from Illinois met her long-distance friend through social media. He currently lives in Scotland, but they're still able to frequently communicate with one another.

    "I can feel close to someone that I'm talking to via (通过) FaceTime," Kaplan said.

    ●Wanting to be "liked"

    The rise of social media has changed the way teenagers see themselves.

    The 19-year-old Essena O'Neill announced on the social networking service Instagram that she was quitting social media because it made her obsessed (痴迷) with appearing perfect online.

    Negative comments also can do great damage to a teenager's self-esteem (自尊).

    In particular, anonymous (匿名的) social media apps such as Yik Yak may provide opportunities for cyberbullying (网络欺凌).

    The app allows users within 5 miles (8 km) to create and add comments to everything. Teenagers who get negative comments on these sites can't help but feel hurt.

    ●Opening new doors

    However, Armin Korsos, a student from Illinois, takes advantage of the comments he receives over social media to improve his videos on the social networking site YouTube.

    "Social media can help people show themselves and their talents to the world in a way that was never possible before," Korsos said.

    But Korsos recognizes that social media has become a distraction.

    "Social media, though it helps people connect with their friends and stay updated, is not all necessary."

Whether in the home or the workplace, social robots are going to become a lot more common in the next few years. Social robots are about to bring technology to the everyday world in a more humanized way, said Cynthia Breazeal, chief scientist at the robot company Jibo.

While household robots today do the normal housework, social robots will be much more like companions than mere tools. For example, these robots will be able to distinguish when someone is happy or sad. This allows them to respond more appropriately to the user.

The Jibo robot, arranged to ship later this year, is designed to be a personalized assistant. You can talk to the robot, ask it questions, and make requests for it to perform different tasks. The robot doesn't just deliver general answers to questions; it responds based on what it learns about each individual in the household. It can do things such as reminding an elderly family member to take medicine or taking family photos.

Social robots are not just finding their way into the home. They have potential applications in everything from education to health care and are already finding their way into some of these spaces.

Fellow Robots is one company bringing social robots to the market. The company's "Oshbot" robot is built to assist customers in a store, which can help the customers find items and help guide them to the product's location in the store. It can also speak different languages and make recommendations for different items based on what the customer is shopping for.

The more interaction the robot has with humans, the more it learns. But Oshbot, like other social robots, is not intended to replace workers, but to work alongside other employees." We have technologies to train social robots to do things not for us, but with us," said Breazeal.