“Hello, Earth! Can you hear me?” That's voice more than 400,000 people received recently. It was from Philae, a space vehicle that landed on a comet(彗星)in 2014. However, its transmissions (传输信号)back home went silent since then.

It took a long time for Philae to make its way across the solar system (太阳系)and reach comet 67P/C-G. The pace vehicle got there aboard the Rosetta probe (探测器), which has been circling around the comet since Philae separated from it in November, 2014．

Philae's job was to collect materials to study the comet's composition. And for about two and a half days after landing, it did just that, sending the information back to scientists on Earth. But Philae's landing on the comet's icy surface had not been smooth. While touching down, it jumped up and ended up in the shadow of something like a huge rock. Philae runs on solar power, but there was no light in the place where it landed. In the end, it failed to work.

However，as comet 67P/C-G moved closer to the sun, more sunlight reached the space vehicle, allowing it to power up and come back online. Philae then sent something to Rosetta, which passed on the information back to Earth.

“We only received the information for about 85 seconds, but that's enough to let us know it is alive and well,”says Stephan Ulamec, who works for the European Space Agency.“We hope to work out where it landed exactly on the 4-kilometer-wide comet. Now we plan to change how Rosetta moves so that Philae can keep on communicating and receiving instructions.”

    When I was a child, my grandmother Adele took me to museums, restaurants, dances. She showered me gifts from her travels around the world. But I can only remember a book she gave me—one book that, to this day, I have not read. She presented me with her own favorite childhood book: Hans Brinker. My grandmother was happy to share this book with me. She even decorated the title page with her proud writing.

    I tried to read it. I adored reading, and would dive into a new pile of books from the library all at once. But something about Hans Brinker just wouldn't let me in. The story was set in Holland, a long time ago. It felt dull and unfamiliar, even though I was a fan of classics of other times and places. I simply read the first pages over and over. I could not progress.

    Standing on a bookshelf in our living room, the book was like something I avoided. It scolded me for not being interested, for not trying hard enough, for disappointing my grandmother. The book started to fit in, almost forgotten, until Adele asked. Had I read it? Did I like it? Always determined, she wanted to know the answer. I would make some kind of excuse, but feel bad, and open it again, hoping for a new reaction. The book weighed on me.

    Years passed and finally Adele and I both accepted that I would never read Hans Brinker. Eventually I cleared the book from the shelf. The Hans Brinker experience led me to set a rule that I've lived by ever since: Do not ask about a book given as a gift and don't let anything become your barrier. What Adele originally wanted to do is to give book-giving special meaning, but she increased the possibility of the owner to be a disappointment.

    It is widely acknowledged that it is by no means an easy task to bring up a child well. And our ancestors already understood it well. As an old proverb says, “It takes an entire village to raise a child.” That is being quoted more and more often these days. And I'm pleased about that.

    Parents need to be involved in their children's education in many ways. Helping children with homework and studying, going on a field trip, teaching a craft or coaching a child's sports team are all great ways to be involved with your child's education. And don't forget to communicate with teachers—they need and respect your input. Studies show that children learn more and schools function better when parents and schools work together.

    Communities can help children create and achieve new goals. There are other ways such as helping with homework. reading to a child, coaching a children's team, providing emotional support, helping solve problems and building self-esteem（自尊）. Kids need role models and advisers can be role models by sharing their experiences and wisdom.

    Businesses can also help shape our children's future—invite a class from your local school to visit your workplace. You may be providing a glimpse that opens a new world of possibilities. Show students what goes on during a typical day. Give a mini course for students: how products are made; how machinery works. You may have a developing electrician, a teacher, a nurse, or even a newspaper reporter on your hands.

    It really does lake an entire village to raise a child. So share the responsibility－and the joy—of bringing a child to his or her full potential.

    Yesterday I went to the nursing home to visit my grandma. She just got out of the hospital recently where she had some serious operations. I wanted to surprise her after work so I stopped by for a quick visit.

    When I got there, she was so happy to see me. We hugged, kissed and exchanged greetings. Then I heard a woman crying. It was my grandma's roommate. The curtain was drawn so I could not see her. She started calling out a name that wasn't mine but she was certainly talking to me, begging me to go to her side of the room.

I ignored her at first and continued talking with my grandma. Then she started begging and saying, "Please, come to see me!" So I went to see her.

    When I drew the curtain back, she looked so old but flashed me the biggest smile! She opened her arms wide for me to hug her so I bent low and gave her a hug. I sat on her bed and talked with her for a few minutes. She kept calling me by the other name, but I did not correct her. She told me stories as if I had been there when they happened.

Finally I went back to talk with my grandma. Then the woman started crying again, saying, "Please, come back." She finally slept.

    I stopped by the nurse's station and the nurse told me that the lady suffers from Alzheimer's (老年痴呆症). I mentioned the name she had called me. The nurse told me it was the lady's daughter's name. Then I understood why she wanted me to go to visit her.

    We will all get old some day. Some of us will have broken minds like the lady and some of us will have broken bodies like my grandma. As I was leaving, I promised I would go back and visit the lady, even after my grandma moved back to her home.

    Having a smart phone may not be as smart as you think. They may let you surf the Internet, listen to music and take photos wherever you are…but they also turn you into a workaholic（工作狂）,it seems.

    A study suggests that, by giving you access to emails at all times, the smart phone adds as much as two hours to your working day. Experts found that British people work an additional 460 hours a year on average as they are able to respond to emails on their mobiles. The study shows the average UK working day is between 9 and 10 hours, but 2 more hours is spent responding to or sending work emails, or making work calls.

    Almost one in ten admits spending up to three hours outside their normal working day checking work emails. Some workers say they are on call almost 24 hours a day. Nearly two-thirds say they often check work emails just before they go to bed and as soon as they wake up, while over a third have replied to one in the middle of the night. The average time for first checking emails is between 6 a.m and 7 a.m, with more than a third checking their first email in the period, and a quarter checking them between 11 p.m.and midnight.

    Ghadi Hobeika, marketing director of Pixmania, said: “The ability to access millions of Apps has made smart phone invaluable for many people. However, there are disadvantages. Many companies expect their employees to be on call 24 hours a day, seven days a week, and smart phones mean that people cannot get away from work. The more frequently in contact we become, the more is expected of us in a work capacity.”

    In an unmanned supermarket, a customer waits to pay. With the use of advanced digital payment technology, including biological recognition and in-depth learning, the man leaves in a minute. There's no cashier in the store. At a large university, students use a hand-scanning machine that authorizes their entry into the gym. Those people are using "smart machines" which identify people by their physical characteristics. These new devices use fingers, hands, faces, eyes and voices. Some machines may even use smells. This new technology, called biometrics, gets information from parts of the body.

    In the past, biometric machines were used mainly in government agencies or in prisons. But now that the cost of the technology is lower, these machines are starting to be used everywhere, from border services to schools.

    Some people, however, are concerned that these machines will mean the destruction of personal privacy. They worry that the machines will get personal information about them, know it seems like these machines are invading our privacy, but actually, biometric machines help to protect it," says Jay Tarkett, who works at a company that develops the machines, "They can be used instead of passwords on a computer, for example. They can also identify criminals at airports. So, really, they help to promote public safety, and all the information stored is kept confidential by the machine itself."

    Some people don't like the idea of using fingerprints because they associate them with criminals, and feel like they are being accused of something, In addition, they don't work for some people, such as bricklayers, who wear down their fingerprints. Yet, face recognition does work well because the subject doesn't really have to do anything, To cash a check at a bank, for example, the customer has to do nothing more than look at a machine similar to an automatic teller. If the face matches the picture kept on file, the customer gets the money with no problems, The need to carry identification with you from place to place, then, would all but cease. It has been found that the hand scan works well ill the college gym. Before this machine was used, students at the college entered the gym using cards similar to credit cards. The problem was that students often lost or forgot their cards. With the hand-scanning machine, however, the problem was solved right away.

    But the machines are still new, and there can be problems. For example, voice recognition works on the phone, but it is not precise, and can be tricked. Another constraint(限制)we notice；, with machines that use face recognition in particular, is that they can be fooled if people color their hair or gain a lot of weight. However, this particular problem may be solved by a new type of technology that scans a person's iris, the colored part of the eye. It can even identify the person from a few feet away, recognizing a customer as he or she approaches the ATM.