An organization,Eye Care 4 Kids,is bringing much-needed eye care to poor kids.It provides free eye examinations for kids from poor families.Founded by Joseph Carbone in 2001,the organization has helped around 100,000 children in Utah and Nevada.

    Now,Cecil Swyers,a biomedical engineer who was once a poor child himself,is bringing the charity's services to poor students in Arizona,so that vision impairment（视力受损）doesn't stand in the way of their education.

    “Eye Care 4 Kids is bringing eye care and glasses to families that wouldn't have the means to pay for them,” said Mario Ventura from Isaac Elementary School District,the first school district in Arizona to receive its services.

    Good vision is important to a child's learning experience.According to a study,up to 80 percent of learning happens through sight for children between 6 and 18 years old.Without proper eye care,it's difficult for students to learn better and succeed.

    Swyers is hoping that by bringing the organization to Arizona he'll help a lot more students.He teamed up with two other organizations to get doctors to volunteer their time with the group.Using Eye Care 4 Kids mobile clinic,Swyers visited Alta E.Butler Elementary School and has already helped 40 students.

    The school was grateful to receive the eye care,especially since the services came to them.“It's is great for us,” said Assistant Pricipal Cindy Alonso.

    Swyers is hoping to bring Eye Care 4 Kids' services to other schools in the state.He said that hopefully his work will have a positive effect on students' futures.“If we can help students while they're young,we can make a difference in their futures,” he said.

    Perhaps the best answer lies in our genetic makeup (基因构成) as human beings. What drove our ancestors to move from the trees into the plains, and on into all possible areas and environments? The wider the spread of a species, the better its chance of survival. Perhaps the best reason for exploring space is this genetic tendency to expand wherever possible.

    Nearly every successful civilization has explored, because by doing so, any dangers in surrounding areas can be identified and prepared for. Without knowledge, we may be completely destroyed by the danger. With knowledge, we can lessen its effects.

    Exploration also allows minerals and other potential (潜在的) resources to be found. Even if we have no immediate need of them, they will perhaps be useful later. Resources may be more than physical possessions. Knowledge or techniques have been acquired through exploration. The techniques may have medical applications which can improve the length or quality of our lives. We have already benefited from other spin-offs including improvements in earthquake prediction, in satellites for weather forecasting and in communications systems. Even non-stick pans and mirrored sunglasses are by-products (副产品) of technological developments in space.

    While many resources are spent on what seems a small return, the exploration of space allows creative, brave and intelligent members of our species to focus on what may serve to save us. While space may hold many wonders and explanations of how the universe was formed or how it works, it also holds dangers. The danger exists, but knowledge can help human beings to survive. Without the ability to reach out across space, the chance to save ourselves might not exist.

    While Earth is the only planet known to support life, surely the adaptive ability of humans would allow us to live on other planets. It is true that the lifestyle would be different, but human life and cultures have adapted in the past and surely could in the future.

    On August 25, Hurricane Harvey made landfall in Southern Texas. The storm lasted for days, pouring almost 52 inches of rain. The downpour has caused widespread flooding, forcing more than 32,000 people into shelters and damaging the city's water supply system.

    The only silver lining is that disasters like these seemed to unite people. While the number of organizations and individuals that have gone all out to assist the victims is too many to list, here are some highlights of the outpouring of support that has made headlines this past week.

    A week ago, NFI player JJ Watt set up a website with a goal to raise $200,000. Soon he has collected over $18 million, and the donations keep pouring in. The thrilled football star wants to ensure the money is used where needed, saying, “We're trying to make sure it goes directly to the people. So our first wave of operation is we'll have nine semi-trucks going out there and I will go straight into the communities and hand stuff out there.”

    Ordinary individuals are not shying away from helping either. Jim McIngvale, the owner of a furniture store, turned his two 100,000-square-foot warehouse into shelters. When asked if he was concerned about the furniture that was being used by those living there, he responded, “These people are nice. They're taking care of the furniture. Furniture's made to be sat on, slept on or laid on. It's just a product.”

    There are also many unsung heroes that are putting their lives at risk to help others. After discovering an elderly man trapped inside his truck, local people made a human chain through the dangerous water to drag him to safety.

    While there is not much anyone could have done to prevent the loss, people across the US are doing everything they can to help its people recover.

    Put an ice cube from your fridge into a glass of water. You have a piece of string (线) 10 centimeters long. The problem is to take out that piece of ice with the help of the string. But you must not touch the ice with your fingers.

    You may ask your friends to try to do that when you are having dinner together. There is a saltcellar on the table. You must use salt when you carry out this experiment.

    First you put the string across the piece of ice. Then put some salt on the ice. Salt makes ice melt (融化). The ice round the string will begin to melt. But when it melts, it will lose heat. The cold ice cube will make the salt water freeze again.

    After a minute or two you may raise the piece of string and with it you will raise your piece of ice!

    This experiment can be very useful to you. If, for example, there is ice near the door of your house, you must use very much salt to melt all the ice. If you don't put enough salt, the water will freeze again.

    The traditional British pub is part of the scenery of British life. At the last count, there are around 50,000 of them in the UK. The oldest – Ye Olde Fighting Cocks in St. Albans – was set up in about 793.

    Because of their abundance, the names pubs take are designed to be memorable, but more than that, they are designed to be visual. Outside any traditional pub worthy of its title, you'll find a hanging signboard with an unusual and uncommon illustration(插图) that represents the name of the business. The practice is so well established that even new pubs copy it. But why do they exist at all?

    The first British pub signs were created in the 12^th century and were simple representations of beer containers and other brewing-related equipment used to tell passersby that establishments sold beer. This was Britain in the dark ages, when education was in short supply. Since most of the population was unable to read, pub signs were used to inform would-be customers that they could find a drink inside.

    The earliest uses of pub names would reference the sign directly. People would appoint to meet at "the sign of the Eagle and Child" rather than at "the Eagle and Child".

    Today the tradition remains unchanged largely out of respect for the past, but many pub signs do have some functionality. Remote country pubs often use signboards to point the way to their doors. It's a part of British culture that's rapidly disappearing – more than 20,000 pubs have closed since 1980 – but for now there are still more than enough. You can take a moment to appreciate the history and symbolism behind a pub's sign the next time you see one.

    Got 48 hours to relax yourself? You'll make full use of your timeand have great fun at these amazing destinations.

    Alabama: Gulf Shores

    For relaxing weekend getaways in Alabama, head south to the white-sand beaches of Gulf Shores. Get on the water for some deep-sea fishing. History lovers can get a lesson in the Civil War along a 90-mile path with more than a dozen historic sites.

    Alaska: Homer

    How does fresh seafood sound? You'll find it in Homer, located in south-central Alaska, which is either a short flight or a great four-hour scenic drive on the Seward Highway from Anchorage. Get your fill of fishing in Kachemak Bay, explore local trails and enjoy exceptional birding in this remote natural setting.

    Arizona: Sedona

    Adventurous types can get their fill in the magical red rocks of Sedona, which is said to be the location of healing centers of energy. People flood to the area to meditate, practice yoga and more. Sedona also offers fantastic hiking, off-roading, biking, and even climbing.

    Arkansas: Hot Springs

    Relax and renew in Arkansas' hot waters in Hot Springs, an art community with Art Deco architecture that is also the home of Hot Springs National Park. Make time for a visit to Bathhouse Row, a National Historic Landmark of eight bathhouses, and Superior Bathhouse Brewery, which produces beer made of the hot spring water inside the National Park. Don't miss these National Parks that are off the beaten path.