Sunscreens (防晒霜) can offer protection from two types of ultraviolet (UV) rays (紫外线): UVB, which according to the Skin Cancer Foundation, are the chief cause of sunburn and play a key role in the development of skin cancer, and UVA, which get through the skin more deeply and are largely responsible for skin aging and wrinkling, as well as skin cancer risk. The SPF (防晒指数) measurement on sunscreens refers to the UVB protection level — and the number may not mean what you think it does. SPF 15 doesn't protect you from 15% of UVB rays, just as SPF 100 doesn't protect you from 100% of the rays. In fact, as you get into the higher numbered SPF sunscreens (think: 50 and above), the difference in UVB protection is actually pretty small.

    Theoretically, though the increase in UVB protection with a super-high SPF sunscreen may be not worth considering, it may help, and certainly can't hurt, to use it — that is, as long as you do so correctly. “The only downside is whether you're giving yourself a sense of false security,” Dr. Gohara says.

    Indeed, as Dr. Wang also pointed out, when people choose increased SPFs, they may actually feel so protected by the product that they finally ignore proper sun protection. “When people use really high SPF products, they tend not to reuse, they tend to stay out in the sun much longer, and they don't use other protective measures such as clothing and hats,” he says. Regardless of any increase in protection that a high SPF may or may not offer, one thing is certain: It doesn't give your body a free pass from sunburns, aging, or cancers, and it doesn't protect you from those things for any greater length of time than the lower SPF options. Both Dr. Wang and Dr. Gohara emphasized that, no matter what the SPF is, it's important to reapply your sunscreen every two hours.

    Ideas about polite behavior are different from one culture to another. Some societies, such as America and Australia, for example, are mobile and very open. People here change jobs and move houses quite often. As a result, they have a lot of relationships that often last only a short time, and they need to get to know people quickly. So it's normal to have friendly conversations with people that they have just met, and you can talk about things that other cultures would regard as personal.

    On the other hand, there are more crowded and less mobile societies where long–term relationships are more important. A Malaysian or Mexican business person, for example, will want to get to know you very well before he or she feels happy to start business. But when you do get to know each other, the relationship becomes much deeper than it would in a mobile society.

    To Americans, both Europeans and Asians seem cool and formal at first. On the other hand, as a passenger from a less mobile society puts it, it's no fun spending several hours next to a stranger who wants to tell you all about his or her life and asks you all sorts of questions that you don't want to answer.

    Cross-cultural differences aren't just a problem for travelers, but also for the flights that carry them. All flights want to provide the best service, but ideas about good service are different from place to place. This can be seen most clearly in the way that problems are dealt with.

    Some societies have “universalist” cultures. These societies strongly respect rules, and they treat every person and situation in basically the same way.

     “Particularist” societies, on the other hand, also have rules, but they are less important than the society's unwritten ideas about what is right or wrong for a particular situation or a particular person. So the normal rules are changed to fit the needs of the situation or the importance of the person.

    This difference can cause problems. A traveler from a particularist society, India, is checking in for a flight in Germany, a country which has a universalist culture. The Indian traveler has too much luggage, but he explains that he has been away from home for a long time and the suitcases are full of presents for his family. He expects that the check–in official will understand his problem and will change the rules for him. The check–in official explains that if he was allowed to have too much luggage, it wouldn't be fair to the other passengers. But the traveler thinks this is unfair, because the other passengers don't have his problem.

    When something goes wrong, it can be very satisfying to say, “Well, it's so-and-so's fault.” or “I know I'm late, but it's not my fault; the car broke down.” It is probably not your fault, but once you form the habit of blaming somebody or something else for a bad situation, you are a loser. You have no power and could do nothing that helps change the situation. However, you can have great power over what happens to you if you stop focusing on whom to blame and start focusing on how to remedy the situation. This is the winner's key to success.

    Winners are great at overcoming problems. For example, if you were late because your car broke down, maybe you need to have your car examined more regularly. Or, you might start to carry along with you the useful phone numbers, so you could call for help when in need. For another example, if your colleague causes you problems on the job for lack of responsibility or ability, find ways of dealing with his irresponsibility or inability rather than simply blame the person. Ask to work with a different person, or don't rely on the person. You should accept that the person. Ask to work with a different person, or don't rely on this person. You should accept that the person is not reliable and find creative ways to work successfully regardless of how your colleague fails to do his job well.

    This is what being a winner is all about—creatively using your skills and talents so that you are successful no matter what happens. Winners don't have fewer problems in their lives; they have just as many difficult situations to face as anybody else. They are just better at seeing those problems as challenges and opportunities to develop their own talents. So, stop focusing on “whose fault it is.” Once you are confident about your power over bad situations, problems are just stepping stop on for success.

    Knowing the “right” thing to say and do as parents is not easy. But what if I told you there's ONE word you can add to your vocabulary that will help set your kids up for success for the rest of their lives? You'd let it flow effortlessly from your parenting lips, right?

    Well, that word is “practice”. It generates confidence and a “can do” attitude in kids when you use the word “practice” in place of the more commonly used word “try”. And here's why.

    “Try” means failure, or at the very least, doubt. From a very young age, we are always told to “try this”, “try that” and “try, try again”… “just try”. But “try” suggests the act of wondering what will happen instead of a clear intention of success.

    How many times have you heard someone say they tried something over and over, and it didn't work? Or that they will try to call you or come over and never show? Our subconscious(潜意识的) programming tells us that “try” is a way out for many. It's a word we use when we don't expect success or don't want to do something. We usually think, “Oh well, at least I tried.”

    The word “practice”, however, is different. Practice always makes you better. everyone who is good at something has practiced－doctors, musicians, athletes, students, speakers, singers and the list goes on and on. Did they try it the first time to see if they wanted to pursue it? Yes, but when it came to improving, they practiced. Even toddlers learning to walk are practicing. They have every intention of working successfully, and they keep at it until they do… and that in itself is a great lesson for us adults.

    Benjamin West, the father of American painting, showed his talent for art when he was only six years of age. But he did not know about brushes before a visitor told him he needed one. In those days, a brush was made from camel's hair. There were no camels nearby. Benjamin decided that cat hair would work instead. He cut some fur from the family cat to make a brush.

    The brush did not last long. Soon Benjamin needed more fur. Before long, the cat began to look ragged（蓬乱）. His father said that the cat must be sick. Benjamin was forced to admit what he had been doing.

    The cat's lot was about to improve. That year, one of Benjamin's cousins, Mr. Pennington, came to visit. He was impressed with Benjamin's drawings. When he went home, he sent Benjamin a box of paint and some brushes. He also sent six engravings（版画） by an artist. These were the first pictures and first real paint and brushes Benjamin had ever seen. In 1747, when Benjamin was nine years old, Mr. Pennington returned for another visit. He was amazed at what Benjamin had done with his gift. He asked Benjamin's parents if he might take the boy to Philadelphia for a visit.

    In the city, Mr. Pennington gave Benjamin materials for creating oil paintings. The boy began a landscape(风景) painting. William Williams, a well-known painter, came to see him work. Williams was impressed with Benjamin and gave him two classic books on painting to take home. The books were long and dull. Benjamin could read only a little, having been a poor student. But he later said,＂ Those two books were my companions by day, and under my pillow at night.＂ While it is likely that he understood very little of the books, they were his introduction to classical paintings. The nine-year-old boy decided then that he would be an artist.

    When I was about 12, I had an enemy, a girl who liked to point out my shortcomings. Sometimes she said I was thin. Sometimes she said I was lazy. Other times she said I wasn't a good student. And still other times she said I talked too much, and so on. I tried to put up with her.

    At last, I became very angry with her. With tears in my eyes, I ran to my father, who listened to me quietly and asked, "Are the things she said true or false? Mary, haven't you ever wondered what you're really like? Go and make a list of everything she said and mark the points that agree with her comments. Pay no attention to the things she said that don't concern you."

    I did as he told me. Much to my surprise, I discovered that over half the things were true. I brought the list back to my dad. He refused to take it. "That's just for you," he said. "You know better than anyone else the truth about yourself. When something said about you is true, you'll find it will be helpful to you. Don't shut your ears. Listen to them all, but hear the truth and do what you think is right."

    Many years have passed. The situation often appears in my mind. In our life we often meet with some trouble and we often go to someone and ask for advice. Some advice you will treasure all your life!