In Western countries, bread is one of the most important foods. When they get up in the morning many people eat toast (烤面包). They spread butter and jam on their toast. People eat bread at other times of the day too. For example, at main meals, they often eat bread with soup.

    It's also very common to eat sandwiches. A sandwich is two pieces of bread with a filling inside - salad, cheese or fish. A hamburger is a kind of sandwich.

There are many different kinds of bread. Some are special to some countries. For example, the baguette (法国棍子面包) is a long, thin loaf that began in France.

    There is also white bread and whole-wheat (全麦面) bread. What's the difference? White bread is refined (精制的). It has things taken out of it to make it softer and easier to eat. The trouble is, white bread also has lots of goodness taken out. Although some people dislike the taste of whole-wheat bread, it is much healthier.

    Some kinds of bread have additives (添加剂). They are put into the bread for many reasons. Some additives are good for you - for example vitamin C. Others are there to make the bread last longer. Still others to make it taste better - but they do not necessarily make the bread healthier to eat!

    Philadelphia offers a ton of attractions that are suitable for people of every age and here are some family—friendly attractions．

    Spruce Street Harbor Park

    Spruce Street Harbor Park，one of the best urban beaches in American，is an outdoor heaven on the Delaware River waterfront．Visitors can relax in a hammock，play on the playgrounds，and play games like table tennis and giant chess．Don't miss out on the park at night，when colorful LED lights hanging from treetops make the entire area bright.

    Blue Cross RiverRink

    Offering ice skating in the winter and roller skating in the summer，Blue Cross RiverRink creates a fun，outdoor experience for the whole family．Visitors can play on the nine-hole mini-golf course during the summer，and enjoy eats and drinks from the on-site(现场的)bar and restaurant all year round．

    Sesame Place

    Big Bird，Elmo and the other stars of Sesame Street come out and play at Sesame Place，the only theme park in the nation starring the popular TV show's most lovable characters．A water park，interactive activities，parades，fireworks and shows add to the fun．

    Once Upon a Nation Storytelling Benches

    On summer days，uniformed and professional storytellers at 13 storytelling benches throughout Philadelphia's Historic District entertain visitors with true，free，three-to-five minute tales about the colonial(殖民的)era as part of Once Upon a Nation．Children can pick up a Story Flag at any storytelling bench，and then collect a star from every storyteller on their journeys．Flags with all the stars can get free rides on the Parx Liberty Carousel at Franklin Square．

    The Lumière Brothers had their film shows, taken over 100 years ago, to 100 paying customers on December 8, 1985. One of their earliest films was a 30-second piece which showed a section of a railway platform. As the train approached, panic started in the theatre: people jumped and ran away. In their confusion, the audiences feared that a real train was about to crush them. That was the moment when cinema was born.

    Early cinema audiences often experienced the same confusion. In time, the idea of films became familiar, the magic was accepted — but it never stopped being magic. Film has never lost its unique power to embrace its audience and transport them to a different world.

    One effect of this realism was to educate the world about itself. Cinema makes the world smaller. Long before people travelled to America or anywhere else, they knew what other places looked like and how other people worked and lived. Undoubtedly, in the lives recorded in film people knew more about American life. Hollywood has dominated the world film market. American imagery — the cars, the cities, the cowboys became the primary imagery of film. Film carried American life and values around the globe.

    And, thanks to film, future generations will know the 20th century more familiarly than any other period. We can only imagine what life was like in the 14th century or in classical Rome. But the life of the modern world has been recorded on films. We shall be known better than any preceding generations.

    The “star” was another natural consequence of cinema. The cinema star was effectively born in 1910. Because everybody in the world seems to know who they are, they appear more real to us than we do ourselves. The star as magnified human self is one of cinema's most strange and enduring legacies(遗产).

    Cinema films originally were planned as short stories, because early producers doubted the ability of audiences to concentrate for more than the length of a reel. Then, in 1912, an Italian 2-hour film was hugely successful, and Hollywood settled upon the novel-length narrative that remains the dominant cinematic convention of today.

    And it has all happened so quickly. Almost unbelievably, it is only 100 years since that train arrived and the audience screamed and fled, perhaps, suddenly aware that the world could never be the same again — that, maybe, it could be better, brighter, more astonishing and more real than reality.

    Dr. Amanda Harris was ready for sleep since it was already 11 pm. The phone rang. On the other end of the line was a woman about to break a promise. The woman was her mother's neighbor. Flora Harris had made the neighbor swear she wouldn't tell her daughter she'd had a heart attack and was in hospital. The neighbor wisely decided to disobey orders.

    Amanda desperately wanted to get to the hospital immediately, but she couldn't. She lives in Washington D. C. and her mother lives in California. For the past year and a half, Amanda has gone to Los Angeles every other month to take care of her mother. Flora Harris takes care of her husband, James, who's 91 and has Alzheimer's disease. They live in their own home, and a caregiver comes to help them a few hours a day.

    Amanda is one of many Americans facing the heartache of how to take care of aging parents from afar. She's often worried and guilty, not to mention busy with a demanding job, two teenage daughters and the frequent trips to California.

    In some ways, Amanda is lucky. She has the resources to make the trips to Los Angeles. Plus, she is a doctor who treats the elderly. She's treated countless patients whose children live far away.

    “But it's still tough,” she says. “I can foresee what the next few years are going to look like, and it's not a pretty picture. There will come a time when my father won't recognize me and I worry he's going to be violent and hurt my mother.”

    So what do you do when you live a continent away from your aging, sick parents? You can hire someone to help, but you can't count on it completely.

    A so-called “smart drug” intended to improve people's cognitive (认知的) function to protect the brain from altitude sickness.

    Visiting high-altitude sites for work, spot, religious pilgrimages and military can result in cognitive effects, including memory loss and attention difficulties. There's little you can do to prevent these symptoms except acclimatize -but this takes time and doesn't always work. A drug called oxiracetam might be the answer.

    ShengLi Hu at the Third Military Medical University, Chongqing, China and her colleagues studied the performance of male military personnel at altitude. All lived in towns around 1,800 meters above sea level, During the study, they spent eight days at this altitude and then climbed for three days to reach 4,000 meters, where they stayed for up to a month.

    Twenty participants took oxriacetam three times a day for the first 15 days of the study, while another 20 received no intervention. The man did tests of attention and memory at the start and end of the study and 20 days in, by which time they had been at 4,000 meters for nine days.

    While all the participants experienced a drop in cognitive ability at 4,00 meters, those who took oxiracetam showed a much smaller drop than the control group.

    The team found that at high altitude the brain stem, which plays a critical role in supporting basic living functions, received blood at the expense of areas responsible for more advanced cognitive functions. But in people who took oxiracetam, blood flowing throughout the brain rose, thus offering more oxygen to these areas. This may be how the drug seems to lessen cognitive problems like with low oxygen.

    It isn't yet known whether diverting blood in this way could have negative effects in the long run. "The results are striking and imply that oxiracetam may be beneficial for helping to relieve cognitive ability decline caused by altitude." says Timothy Hales at the University of Dundee, UK.

    If you're feeling overwhelmed by all the features and apps available on smart phones these days and miss the good old days when mobile phones were simple communication tools, you'll probably love Light Phone 2, a stylish " dumb phone" designed to remove time-wasting distractions(使人分心的事物) from your life.

    The original Light mobile phone could only be used to make and take phone calls, but its creators recently decided that in order to improve its usefulness while still keeping users safe from smart phone distractions, it needed a few extra features. They recently announced Light Phone 2 is just as tiny and stylish as the original ones, but also features text messaging functions and an alarm clock.

    Data from company Flurry shows that people in the US spend around five hours a day on their smart phones, while a study from the firm Asurion found that Americans check their phones an average of 80 times per day. Those are some pretty alarming numbers, and to make matters worse, scientists report that too much screen time has a bad effect on our brains, especially those of children.

    Light Phone 2 will never replace your Apple phone, but it can at least help you mitigate the effects of smart phone addiction by allowing you to "go light" every once in a while. You can stay in touch with the important people in your life, but you'll be free from the apps distracting you from the wonders of the colorful world.

    But becoming free of smart phone distractions doesn't come cheap. The Light Phone 2 is expected to be priced at around $400, which is far more expensive than some smart phones. However, a lot of people seem to think the phone and what it promises to do are worth the price, as evidenced by the success of Light's latest crowd funding(众筹) campaign. With 24 days left until deadline, the company has already raised $360,000, blowing past its $250,000 goal.