A beautiful and very successful actress (女演员) was the star for a new musical show. Her home was in the countryside, but she did not want to go back there every night, so she bought an expensive house in the centre of the city, got some beautiful furniture and got a man to paint the rooms in new colours.

    It was very difficult to get tickets for her show, because everybody wanted to see it. So she decided to give the painter two of the best seats. She hoped that this would make him work better for her. He took the tickets without saying anything, and she heard no more about them until the end of the month, when she got the painter's bill (帐单). At the bottom of it were these words: “ Four hours watching Miss Hall sing and dance : 3 pounds,” with this note: “ After 5 p.m. I get 15 shillings (先令) an hour instead of 10 shillings.”

    Eating too much fatty food, exercising too little and smoking can raise your future risk of heart disease．But there is another factor that can cause your heart problems more immediately: the air you breathe.

    Previous studies have linked high exposure (暴露）to environmental pollution to an increased risk of heart problem, but two analyses(分析) now show that poor air quality can lead to heart attack or stroke (中风）within as little as a few hours after exposure．In one review of the research, scientists found that people exposed to high levels of pollutants (污染物）were up to 5% more likely（可能的） to suffer a heart attack within days of exposure than those with lower exposure．A separate study of stroke patients showed that even air that the U．S．Environmental Protection Agency (EPA) considers to be of “moderate” (良好）quality and relatively safe for our health can raise the risk of stroke as much as 34% within 12 to 14 hours of exposure.

    The authors of both studies stress（强调）that these risks are relatively（相对的）small for healthy people and certainly modest compared with other risk factors such as smoking and high blood pressure．However, it is important to be aware of these dangers because everyone is exposed to air pollution regardless of lifestyle choices．So stricter regulation（规章制度）by the EPA of pollutants may not only improve environmental air quality but could also become necessary to protect public health.

    Australia is a big country, but it is easy to get around. The untouched beaches that go for miles and deserts that touch the horizon(地平线) are just there, waiting to be reached and explored. You can explore the big country in different ways.

Air

    Flying is the best way to cover large distances in a short time. You can spend more time on the Australia's landscapes(陆地风光) and relaxing lifestyle. Moreover, competition among airlines makes great flying fees available for you.

Drive

    Australia has a big network of well-kept roads and some of the most beautiful touring routes in the world. You have no trouble finding car rental companies at major airports, central city and suburbs(怒火).

Bus

    Bus travel in Australia is comfortable, easy and cheap. Buses generally have air conditioning, reading lights, adjustable(可凋) seats and videos. Services are good for everyone, frequent.

Rail

    Train travel is the cheapest and gives you an insight into Australia's size, all from the comfort of your carriage. Scheduled services are a great way to get quickly between our cities and regional centers.

Ferry(轮渡)

    The Spirit of Tasmania runs a passenger and vehicle ferry service between Melbourne and Tasmania nightly. Extra services are running during summer rush hours. Sea-link ferries connect South Australia and Kangaroo Island several times a day. Ferries connect suburbs in our capital cities.

    Besides all of above, you can also experience some of the longest tracks and trails in the world in central Australia-impressive journeys of a thousand kilometers or more that can take several weeks to complete.

    Paul and Jason were brothers who lived and worked on neighboring farms. For 35 years they farmed side by side, sharing machinery and goods as needed, without a single problem.

    However, one autumn, things changed. It began with a tiny disagreement about a horse, which grew into a major difference. The difference led to angry words, followed by weeks of silence between the two brothers.

One morning there was a knock on Paul's door. He opened it and saw a builder holding his toolbox. "I'm looking for a few days' work." the builder said. "Are there any jobs here I could help with?"

"Yes," answered Paul, extremely pleased to see the builder. "I do have a job for you. Look at that farm across the creek(小溪).That's my brother's farm. That creek used to be a grass field, but last week my brother dug a path from the river and made the creek. But I'll go him one better. See that pile of wood? I want you to build me a fence, two meters tall, so 1 won't need to see him anymore."

The builder said thoughtfully. "I think I understand the situation and I'll be able to do a job that pleases you."

    Paul had business in town that day and left the builder to his work. When he returned, the builder had just finished his job. Paul was shocked. Instead of a fence there was a bridge, stretching from one side of the creek to the other.

As Paul stood on the bridge, staring in amazement, his younger brother Jason, came across, and took Paul's hand. "You are a good man to have built this bridge after all I've done," said Jason.

Then, Paul, with tears in his eyes, said to the builder who was packing his bag to go, "Thank you so much. Please stay. I have much more for you to do."

"I'd love to." the builder said quietly, "but, I have many more bridges to build."

    Public transport is declining in the rich world. To those who have to squeeze onto the number 25 bus in London, or the A train in New York, the change might not be noticeable. But public transport is becoming less busy in those places, and passenger numbers are flat or falling in almost every American city. That is despite healthy growth in urban populations and employment.

    Although transport agencies blame their unpopularity on things like road works and broken signals, it seems more likely that they are being outcompeted. App-based taxi services like Uber and Lyft are more comfortable and convenient than trains or buses. Cycling is nicer than it was, and rental bikes are more widely available. Cars are cheap to buy, thanks to cut-rate loans, and ever cheaper to run. Online shopping, home working and office-sharing mean more people can avoid travelling altogether.

    The competition is only likely to grow. More than one laboratory is developing new transport technologies and applications. Silicon Valley invented Uber and, more recently, apps that let people rent electric scooters(滑板车) and then abandon them on the pavement. China created sharing-bicycles and battery-powered "e-bikes", both of which are spreading.

    Transport agencies should accept the upstarts, and copy them. Cities tend either to ignore app-based services or to try to push them off the streets. That is understandable, given the rules-are-for-losers attitude of firms like Uber. But it is an error.

    It is doubtful that most people make hard distinctions between public and private transport. They just want to get somewhere, and there is a cost in time, money and comfort. An ideal system would let them move across a city for a single payment, transferring from trains to taxis to bicycles as needed. Building a platform to allow that is hard, and requires much sweet-talking of traditional networks as well as technology firms. It is probably the secret to keeping cities moving.

    When I was five or six years old, I remember watching TV and seeing other children suffer in other parts of the world. I would say to myself, "When I grow up, when I can get rich, I will save kids all over the world."

    At 17, I started my career here in America, and by the age of 18, I started my first charity organization. I went on to team up with other organizations in the following years, and met, helped, and even lost some of the most beautiful souls, tern six-year-old Jasmina Anema who passed away in 2010 from leukemia (白血病), whose story inspired thousands to volunteer as donors, to 2012 when grandmother lost her battle with cancer, which is the very reason and the driving force behind the Clara Lionel Foundation( CLF). We're all human. And we all just want a chance: a chance at life, a chance in education, a chance at a future, really. And at CLF, our mission is to impact as many lives as possible, but it starts with just one.

    People make it seem too hard to do charity work. The truth is, you don't have to be rich to help others. You don't need to be famous. You don't even have to be college-educated. But it starts with your neighbor, the person right next to you, the person sitting next to you in class, the kid down the block in your neighborhood. You just do whatever you can to help in any way that you can. And today, I want to challenge each of you to make a commitment to help one person，one organization，one situation that touches your heart. My grandmother always used to say, "If you've got a dollar, there's plenty to share."