In Korea, it is rude to wear shoes inside someone's house because it is considered dirty. In Saudi Arabia, you should not bring food to someone's house because taking food or drink suggests that you think the host cannot afford the meal. More and more people around the world are travelling abroad to study, to go on vacation, or to work, and while it can be a great way to learn about other cultures, there may be times when travelers accidentally annoy their host.

    The same gesture can have very different meanings in different countries. The gesture meaning OK in the United States means something completely different in Brazil as Ella Yao discovered. Ella had travelled to Brazil to study and was living with a host family. During dinner, her host asked Ella if she was enjoying the meal. Because her mouth was full of food, Ella made a sign with her hand that to her meant OK. Although Ella meant the food was good, this symbol in Brazilian culture is extremely rude and her host was deeply annoyed.

    While travelling in Thailand, Elizabeth Brown learned that there are differences in food in the United States and Thailand. She stopped at a small, family-owned restaurant in Chiang Mai and ordered spring rolls. She was really enjoying eating them until she got the last one and noticed that there was an insect inside. She complained to the server. Later, she discovered that although insects are disgusting to most Americans, they are considered a delicacy(佳肴) in some countries.

    All these mistakes can be avoided with some research on cultural differences before you go abroad. However, if you do accidentally annoy someone, quickly apologize, and learn from your mistake.

    BEIJING — China's education authority will tighten the widely criticized policy of “extra credits” for the national college entrance examination to ensure a fairer chance for all exam-takers.

    Under the policy, high school students who win awards in national Olympic competitions could get "extra credits', up to 20 points for the national college entrance exam. Students with talent in sports and students who are from ethnic groups can also benefit from this policy. The extra credits have increased these students' chances of being admitted by famous universities. Some parents were found to have helped their children fabricate(伪造)award experiences or falsify qualifications to get extra credits.

    “It has harmed education equality，” the ministry said.

    Xiong Bingqi, vice-chief of the 21st Century Education Research Institute, said the policy is designed to help students who have special talents but may be weak in academic performance to have a chance to receive higher education. It will still be needed but it is time to make the rules fairer," he said.

    The ministry said it will reduce the range of competitions whose winners can get extra credits, and limit the winners, privileges.

    The new policy will apply to students who begin high school in 2011, it said.

    Chen Lei, a mother of a 10-year-old girl, said she welcomed the ministry's policy adjustment as she does not want her daughter to become an Olympic competition geek.

    But not all the Chinese parents welcomed the new policy. “It is like a thunderbolt for me. My 13-year-old son has spent so much time studying Olympic math, and participated in so many technological competitions during vacations. It is useless now,” said Dong Wen, a 43-year-old mother.

    A student said, “Many students have changed the current study plan, and they can abandon the competition. I will be interested in learning the courses which can improve my abilities.”

    Yuan Guiren, minister of education, told China Daily that the reform is an attempt to consider the overall quality of an applicant. “But the country will not stop the national college entrance  examination as it is still the most objective way to evaluate talent in China,” he said.

TaIL Spin

    Two dolphins race around in a big pool in the Ocean Park. The smaller dolphin Grace, shown off a few of her tricks, turning around and waving hello to the crowd. The most amazing thing about her, however, is that she's even swimming at all. She doesn't have a tail.

Grace lost her tail as a baby when she got caught up in a fish trap. When the dolphin arrived at the Ocean Park in December 2005, she was fighting for her life. “Is she going to make it?” Her trainer, Abbey Stone, feared the worst. Grace did make it — but her tail didn't. She ended up losing her flukes and the lower part of her peduncle.

Over the past six years, she has learned to swim without her tail. Dolphins swim by moving their flukes and peduncle up and down. Grace taught herself to move another way—like a fish! She pushed herself forward through the water by moving her peduncles from side to side.

    The movement put harmful pressure on Grace's backbone. So a company offered to create a man-made tail for her. The tail had to be strong enough to stay on Grace as she swam but soft enough that it wouldn't hurt her.

    The first time Grace wore the artificial tail. She soon shook it off and let it sink in the bottom of the pool. Now, she is still learning to use the tail. Some days she wears it for an hour at a time, others not at all. “The tail isn't

necessary for her to feel comfortable,” says Stone, “but it helps to keep that range of motion(动作) and build muscles(肌肉).”

    Now, the dolphin is about to get an even happier ending. This month, Grace will star in Dolphin Tale, a film that focus on her rescue and recovery. Her progress has inspired more than just a new movie. Many people travel from near and far to meet her. Seeing Grace swim with her man-made tail gives people so much courage.

    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 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,” 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 the components together. “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, and 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.

    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.”

    One of the most important things in the world is friendship. In order to have friends, you have to be a friend. But how can you be a good friend at school?

    Listen — Listen when they are talking. Don't say anything unless they ask you a question. Sometimes it's not necessary for you to have anything to say; they just need someone to talk to about their feelings.

    Help them — If your friend is ever in need of something, be there to help them. You should try to put them first, but make sure you don't do everything they want you to do. Try to take an extra (额外的) pencil or pen with you to classes in case (以防) they forget one. Have a little extra money in your pocket in case they forget something they need.

    Be there for them — Try to make something for your friend to help make them feel better in hard times. Making cards and encouraging them are among the nicest things you can do for a friend. Marilyn Monroe, a famous U.S. actor, once said, "I often make mistakes. Sometimes I am out of control. But if you can't stay with me at my worst, you are sure not to deserve (值得) to be with me at my best." Always remember this! If you don't want to stay with your friends when they're in hard times, then you don't deserve to be with them when they're having a good time!

    ______—Try to make plans with your friends.  Go shopping, go for ice cream, have a party, go to a movie and so on. Take time to know each other even better by doing something you both enjoy. By planning things together, you both can have a good time. And you'll remember these things when you're all old!

"I'm going to play basketball, Daddy." Lauren flew into my arms when I came in from work. "That's 1 , honey," I replied naturally. I thought she meant outside the house—on the driveway. Into the kitchen, my wife Helen's silence indicated I had 2 something. After a while, she spoke slowly, "Lauren is joining the girls' high-school basketball team."

I 3 my girl's sportsmanlike courage, but 4 was still in my stomach. Lauren was only just 1.55m tall. 5 legs and a heavy body were surely a(n) 6 for her in playing basketball.

Finally, the game day arrived. Lauren and her teammates moved out. Their game faces seemed 7 to win. At first, though not playing, Lauren followed the movement on the court and 8 every play. I could even 9 her shout "No way!" when a referee made an unfair call against a teammate. Sitting on the sidelines, Lauren still enjoyed the game very much.

Suddenly, the announcer's voice boomed, "Number thirty-three, Lauren Wray, in." My heart 10 wildly. What if she got injured or other girls on the team made fun of her? But what I saw was that Lauren made every effort to keep pace with the others. Just before the end of the game, they 11 the ball to Lauren. She caught it. She shot. 12 she scored!

The audience began clapping and 13 . Lauren's brown eyes shone as she wiped her sweaty forehead. Lauren's uplifting spirits and impressive performance, wrapped in a small 14 , struck everyone greatly. I felt enormously 15 to have Lauren as my daughter.