Traveling is a very good activity. When you are fed up with your work and are allowed to take a holiday, you can go to the beautiful spots to enjoy the beauty of nature and the special character of other cities. You can breathe fresh air, visit some places of interest, meet different people and make friends with them. Then you will feel fully relaxed and you will have the energy to undertake the new tasks waiting for you.

    But sometimes, traveling is not an enjoyable thing. For example, when the bus or car you take has a bad accident, you may be trapped in it and waste your time. What's more, the weather can be changeable. If you are climbing a mountain, it may rain suddenly. You may be caught in the rain and may catch a cold. The worst thing is that you may have your money stolen and you may have an injury. All these are terrible things that can happen to a tourist.

    Therefore, before going on a trip, you must prepare yourself carefully. Firstly, you must have clear information about the weather. Secondly, you should choose a good companion so that you can help each other. Thirdly, you must be careful everywhere and try to avoid accidents. If you do these, you can enjoy your travels better and reduce unnecessary trouble.

    Recently, we have already shown that climate change has led to a dramatic increase in storm surge risk in New York City, making devastating events like Hurricane Sandy more likely.

    What can we say about the role of climate change in the unprecedented disaster that is unfolding in Houston with Hurricane Harvey? There are certain climate change-related factors that we can, with great confidence, say worsened the flooding.

    Sea Level rise attributable to climate change-some of which is due to coastal subsidence(下沉) caused by human disturbance such as oil drilling-is more than half a foot(15cm) over the past few decades. That means the storm surge was half a foot higher than it would have been just decades ago, meaning far more flooding and destruction.

    In addition to that, sea surface temperatures in the region have risen about 0.5C(close to 1F) over the past few decades from roughly 30C(86F) to 30.5C(87F), which contributed to the very warm sea surface temperatures(30.5-31C, or 87-88F). There is a simple thermodynamic(热力学的) relationship known as the Clausius-Clapeyron equation that tells us there is a roughly 3% increase in average atmospheric moisture content for each 0.5C of warming. Sea surface temperatures in the area where Harvey intensified were 0.5-1C warmer than current-day average temperatures, which translates to 1-1.5C warmer than “average” temperatures a few decades ago. That means 3-5% more moisture(水分) in the atmosphere. That large amount of moisture creates the potential for much greater rainfalls and greater flooding. The combination of coastal flooding and heavy rainfall is responsible for the devastating flooding that Houston is experiencing.

    Not only are the surface waters of the Gulf of Mexico unusually warm right now, but there is a deep layer of warm water that Harvey was able to feed upon when it intensified at near record pace as it neared the coast. Human-caused warming is penetrating down into the ocean. It's creating deeper layers of warm water in the Gulf and elsewhere. Harvey was almost certainly more intense than it would have been in the absence of human-caused warming, which means stronger winds, more wind damage and a larger storm surge.

    Finally, the more tenuous but potentially relevant climate factors: part of what has made Harvey such a devastating(毁灭性的) storm is the way it has stalled near the coast. It continues to strike Houston and surrounding regions with a seemingly endless flood, which will likely top out at nearly 4ft(1.22m) of rainfall over a days-long period before it is done. The stalling is due to very weak prevailing winds, which are failing to steer the storm off to sea, allowing it to spin around and wobble back and forth. This pattern, in turn, is associated with a greatly expanded subtropical high pressure system over much of the US at the moment, with the jet stream pushed well to the north. This pattern of subtropical expansion is predicted in model simulations of human-caused climate change. More tenuous(微弱的), but possibly relevant still, is the fact that very persistent, nearly “stationary” summer weather patterns of this sort, where weather anomalies(both high-pressure dry hot regions and low-pressure stormy/rainy regions) stay locked in place for many days at a time, appears to be favoured by human-caused climate change.

    In conclusion, while we cannot say climate change “caused” Hurricane Harvey, what we can say is that it exacerbated several characteristics of the storm in a way that greatly increased the risk of damage and loss of life. Climate change worsened the impact of Hurricane Harvey.

    Papa, as a son of a dirt-poor farmer, left school early and went to work in a factory, for education was for the rich then. So, the world became his school. With great interest, he read everything he could lay his hands on, listened to the town elders and learned about the world beyond his tiny hometown. “There's so much to learn,” he'd say. “Though we are born stupid, only the stupid remain that way.'' He was determined that none of his children would be denied an education.

    Thus, Papa insisted that we learn at least one new thing each day. Though, as children, we thought this was crazy, it would never have occurred to us to deny Papa a request. And dinner time seemed perfect for sharing what we had learned. We would talk about the news of the day; no matter how insignificant, it was never taken lightly. Papa would listen carefully and was ready with some comment, always to the point.

    Then came the moment-the time to share the day's new learning.

Papa, at the head of the table, would push back his chair and pour a glass of red wine, ready to listen.

    “Felice,” he'd say. “tell me what you learned today.”

    “I learned that the population of Nepal is...”

Silence.

    Papa was thinking about what was said, as if the salvation (拯救) of the world would depend upon it. “The population of Nepal. Hmm. Well...” he'd say. “Get the map; let's see where Nepal is.” And the whole family went on a search for Nepal.

    This same experience was repeated until each family member had a turn. Dinner ended only after we had a clear understanding of at least half a dozen such facts.

    As children, we thought very little about these educational wonders. Our family, however, was growing together, sharing experiences and participating in one another's education. And by looking at us, listening to us, respecting our input, affirming (打定) our value, giving us a sense of dignity. Papa was unquestionably our most influential teacher.

    Later during my training as a future teacher, I studied with some of the most famous educators. They were imparting what Papa had known all along-the value of continual learning. His technique has served me well all my life. Not a single day has been wasted, though I can never tell when knowing the population of Nepal might prove useful.

    Years ago, the American writer Kurt Vonnegut often said there was one story that would always make a million dollars: Cinderella.

    Cinderella made more like $ 70 million in ticket sales when it opened last weekend. But the movie got a mixed reaction. David Rooney of The Hollywood Reporter praised the movie and said, “Anyone will find something to enjoy in it.” Steven Rea of The Philadelphia Inquirer called the movie “a winning re-do”. Richard Corliss of Time magazine wrote that “Disney finally got Cinderella right. ” Other people were not as happy with the movie. Sara Stewart of the New York Post wrote, “This Cinderella is all dressed up with nowhere very interesting to go.”

    Although different people think differently towards the movie, what is clear, however, is the movie's business success. It is not only popular in the theaters but also in sales. And Disney has widened its usual market for Cinderella products.

    There are products connected to the Disney movie targeted (面向) not only at little girls, but women, too. For example, the famous shoe designer Jimmy Choo worked with Disney to create Cinderella's shoes”. You can buy them for about $ 5,000. At that price, you would not want to lose one at the party, even if that is the way you get your prince (王子).

    The make-up (化妆品) company MAC quickly sold all its products connected to Cinderella. HSN is a popular website selling clothing and objects for the home. The marketer is now also selling Cinderella products.

    So, is there anything left for the children, those people we think of as the traditional audience (观众) for the age-old tale? Yes, you can find toys and other children's products at the American store JCPenney. Of course, you can also visit a Disney store.

    Teenagers who talk on the cell phone a lot, and hold their phones up to their right ears, score worse on one type of memory test. That's the finding of a new study. That memory impairment might be one side effect of the radiation (放射线) that phones use to keep us connected while we're on the go.

    Nearly 700 Swiss teens took part in a test of figural memory. This type helps us remember abstract (抽象的) symbols and shapes, explains Milena Foerster. The teens took memory tests twice, one year apart. Each time, they had one minute to remember 13 pairs of abstract shapes. Then they were shown one item from each pair and asked to match it with one of the five choices. The study volunteers also took a test of verbal memory. That's the ability to remember words. The two memory tests are part of an intelligence test. The researchers also surveyed the teens on how they use cell phones. And they got call records from phone companies. The researchers used those records to figure out how long the teens were using their phones. This allowed the researchers to work out how big a radiation exposure (接触) each person could have got while talking.

    A phone user's exposure to the radiation can differ widely. Some teens talk on their phones more than others. People also hold their phones differently. If the phone is close to the ear, more radiation may enter the body, Foerster notes. Even the type of network signal that a phone uses can matter. Much of Switzerland was using an older "second-generation" type of cell phone networks, the study reports. Many phone carriers (通讯公司) have moved away from such networks. And more companies plan to update their networks within the next few years.

    The teens' scores in the figural memory tests were roughly the same from one year to the next. But those who normally held their phones near the right ears, and who were also exposed to higher levels of radiation, scored a little bit worse after a year. No group of teens showed big changes on the verbal memory test. Why might one type of memory be linked to cell phone use, but not another? Foerster thinks it could have to do with where different memory centers sit in the brain. The site that deals with the ability to remember shapes is near the right ear.

    We all long for friendship, but how to make a friend? "The best time to make a friend is before you need one." Joy Steven said. The following are some tips for you.

    People equal friends

    Friends usually begin with strangers. Getting in touch with other people is the first step to make a friend. Friends can't be made in empty air. Best friends take time to make.

    Friends understand friends

    Friends understand each other when talking. Many unpleasant personal quarrels can be avoided if you will take the time to understand others' feelings and points of view.

    Friends touch friends

    Touching is a warm from of communication between friends. When you see best friends communicating, you will notice them stand close together, touch each other comfortably and listen to each other. Sometimes a friendly touch is more powerful than words.

    Friends praise friends

    Praise is a powerful tool to make a friend. Honest praise can affect (影响) your friends' lives. So try to praise your friends, including your general ones.

    Friends can loyal (忠诚的) and trustworthy

    Trust and loyalty go hand in hand for friends. Friends can share secrets with you, because good friends never break confidence (信心) and are loyal forever.