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    There's a new frontier in 3D printing that's beginning to come into focus: food. Recent development has made possible machines that print, cook, and serve foods on a mass scale. And the industry isn't stopping there.

Food production

    With a 3D printer, a cook can print complicated chocolate sculptures and beautiful pieces for decoration on a wedding cake. Not everybody can do that — it takes years of experience, but a printer makes it easy. A restaurant in Spain uses a Foodini to "re-create forms and pieces" of food that are "exactly the same," freeing cooks to complete other tasks. In another restaurant, all of the dishes and desserts it serves are 3D-printed, rather than farm to table.

Sustainability(可持续性）

    The global population is expected to grow to 9.6 billion by 2050, and some analysts estimate that food production will need to be raised by 50 percent to maintain current levels. Sustainability is becoming a necessity. 3D food printing could probably contribute to the solution. Some experts believe printers could use hydrocolloids (水解胶体) from plentiful renewables like algae(藻类) and grass to replace the familiar ingredients(烹饪原料). 3D printing can reduce fuel use and emissions. Grocery stores of the future might stock "food" that lasts years on end, freeing up shelf space and reducing transportation and storage requirements.

Nutrition

    Future 3D food printers could make processed food healthier. Hod Lipson, a professor at Columbia University, said, "Food printing could allow consumers to print food with customized nutritional content, like vitamins. So instead of eating a piece of yesterday's bread from the supermarket, you'd eat something baked just for you on demand."

Challenges

    Despite recent advancements in 3D food printing, the industry has many challenges to overcome. Currently, most ingredients must be changed to a paste(糊状物) before a printer can use them, and the printing process is quite time-consuming, because ingredients interact with each other in very complex ways. On top of that, most of the 3D food printers now are restricted to dry ingredients, because meat and milk products may easily go bad. Some experts are skeptical about 3D food printers, believing they are better suited for fast food restaurants than homes and high-end restaurants.

    Our news is constantly filled with the reality of death and dying. And each of us, if we live long enough, experiences the loss of persons we loved. Children ages eight through ten were asked what they thought about death,and these are some of their answers:

    “When you die,God takes care of you like your mother did. When you were alive,only God doesn't yell at you all the time.''(Beth,9)

    “When you die,they bury you in the ground and your soul goes to heaven,but your body can't go to heaven because it's too crowded there already.” (Jimmy, 8)

    “Only the good people go to heaven. The other people go where it's hot all the time like in Florida. ” (Judy,9)

    “Doctors help you so you won't die until you pay their bills.”(Stephanie,9)

    I've observed that the loss of a loved one can be one of the most difficult things we humans can face. I've known friends of sick and dying people to sit by a bedside or in a hospital room for hours,even days, at a time. I've seen food in homes of people who are dying overflow from kitchen to dining room—food brought by comforting friends from church and con cerned neighbours. And I've observed friends just listen for as long as it takes.

    When U.S. Congressman Sam Rayburn (1882—1961) discovered that he was ill,he announced to the House of Representatives he was going home to Texas for medical tests. Some wondered why he did not stay in Washington where there were excellent medical facilities. His answer was a beautiful tribute (颂词) to friendship:"Bonham is a place where people know it when you're sick,and where they care when you die. ”

    No one wants to go through difficult times alone. So Rayburn traded the best of medical technology for the closeness of loving friends. He knew that good friends are good medicine. Often the best.

    TOASTMASTERS

    Toastmasters is an international organization, designed to develop effective speaking and listening skills. It was set up in 1924 by Ralph Smedley and it's headquartered in California. It has a double purpose: the personal growth and strong effective communication skills.

    Who is Toastmasters open to?

    Many people think Toastmasters is open only to those who wish to be professional speakers, but that is not true. Toastmasters is open to the public at large. Any person who wishes to improve his public speaking is welcome. And also, those who just want to increase their overall self-confidence are encouraged to attend.

How can Toastmasters help you?

    Joining Toastmasters, a person will learn different methods of communicating what he really wants to say, and equally important, he will learn what the audience expects so he can send that message to them in an organized way. Some people are comfortable around friends, but when they appear before a group they don't know, they get nervous. The organization helps its members to get calm and organize thoughts, and express them in an effective way.

    Most often, people assume that when one is listening, he is also paying attention. This is not always true. Many times people are waiting for their turn to speak and are not really listening at all. Toastmasters can develop a person overall in organizing their thoughts, getting information from others and receiving effective feedback（反馈）.

    How does Toastmasters train people?

    Toastmasters has a way of learning by doing. The Toastmasters International Organization provides a menu called the basic menu because it gives a guideline for the development of speeches. These speeches can meet different purposes. For example, one might need voice training; another might be to organize his thoughts or develop use of humor in speeches. There is an eight-week program for young people and also an eight-week speech course offered for adults. As a person continues to give speeches and improve, he progresses from the point of being fearful to stand before a group to the point where he can speak to any group of people with confidence.

    You probably know who Marie Curie was, but you may not have heard of Rachel Carson. Of the outstanding ladies listed below, who do you think was the most important woman of the past 100 years?

    Jane Addams (1860-1935)

    Anyone who has ever been helped by a social worker has Jane Addams to thank. Addams helped the poor and worked for peace. She encouraged a sense of community(社区) by creating shelters and promoting education and services for people in need. In 1931, Addams became the first American women to win the Nobel Peace Prize.

    Rachel Carson (1907-1964)

    If it weren't for Rachel Carson, the environmental movement might not exist today. Her popular 1962 book Silent Spring raised awareness of the dangers of pollution and the harmful effects of chemicals on humans and on the world's lakes and oceans.

    Sandra Day O'Connor (1930-present)

    When Sandra Day O'Connor finished third in her class at Stanford Law School in 1952, she could not find work at a law firm because she was a woman. She became an Arizona State Senator(参议员) and in 1981, the first woman to join the US Supreme Court（高等法院）. O'Connor gave the deciding vote in many important cases during her 24 years on the top court.

    Rosa Parks (1913-2005)

    On December 1, 1955, in Montgomery, Alabama, Rosa Parks would not give up her seat to a white passenger. Her simple act landed Parks in prison. But it also set off the Montgomery bus boycott. (抵制行动) It lasted for more than a year, and kicked off the civil-rights movements. "the only tired I was, was tired of giving in." said Parks.

    When you're on the go, your best friend and resource can be your phone. In the age of smart phones, apps are like guiding stars: They can point you in the right direction for a hotel, list expenses, send postcards, and much more. When used together, these apps can be the basic travel tool, placing a wealth of information at your fingertips no matter where you are on the planet. U.S. News Travel has picked the essential travel apps, known for their utility and reliability. Best of all, they cost absolutely nothing.

    Trip It

    Your Personal Travel Agent

    Be your own travel agent and plan every detail of your trip-- from car rental to accommodating restaurants-- with Trip It. You can make travel schedule by hand, or simply forward the email confirmations of your flight, rental car, train tickets, and hotels to plans.

Weather Free

    Your Go-To Meteorologist(气象学者)

    Stop trying to explain the weather forecast on the evening news (particularly when it's in a foreign language.) The Weather Free app informs you (in English) of the climate in various locations. It features the local weather, and other key factors that will inform your decision about what to wear before stepping outside.

    Goby

    Your Event Guru

    When you're in a foreign city, you sometimes look around and ask: Where are all the people? Goby has the answer. This app pinpoints the neighborhood hot spots (including museums, hotels, eateries, and more) in your neighborhood. But its true value comes in finding nearby events. You'll discover concerts, plays, and more right around the corner.

    America is a mobile society. Friendships between Americans can be close and real, yet disappear soon if situations change. Neither side feels hurt by this. Both may exchange Christmas greetings for a year or two, perhaps a few letters for a while—then no more. If the same two people meet again by chance, even years later, they pick up the friendship. This can be quite difficult for us Chinese to understand, because friendships between us flower more slowly but then may become lifelong feelings, extending (延伸) sometimes deeply into both families.

    Americans are ready to receive us foreigners at their homes, share their holidays, and their home life. They will enjoy welcoming us and be pleased if we accept their hospitality (好客) easily, but truly can't manage the time to do a great deal with a visitor outside their daily routine. They will probably expect us to get ourselves from the airport to our own hotel by bus. And they expect that we will phone them from there. Once we arrive at their homes, the welcome will be full, warm and real. We will find ourselves treated hospitably.

    Another difficult point for us Chinese to understand Americans is that although they include us warmly in their personal everyday lives, they don't show their politeness to us if it requires a great deal of time. This is usually the opposite of the practice in our country where we may be generous with our time. Sometimes, we, as hosts, will appear at airports even in the middle of the night to meet a friend. We may take days off to act as guides to our foreign friends. The Americans, however, express their welcome usually at homes,

    For the Americans, it is often considered more friendly to invite a friend to their homes than to go to restaurants, except for pure business matters. So accept their hospitality at home!