Glacier Bay is one of the most famous parks in America, located in the state of Alaska. This park in the southeastern part of the state covers more than 1 million hectares of Alaskan wilderness. It includes mountains, glaciers (冰川), bays, and even rainforests. Glacier Bay supports hundreds of kinds of animals, including many species of birds, fish, bears, whales and sea lions.

    As its name suggests, much of Glacier Bay National Park is covered by glaciers. A glacier is a large area of ice that moves slowly down a slope (斜坡) or valley, or over a wide area of land. Glaciers cover more than 5,000 square kilometers of the park.

    Glacial ice has shaped the land over the last seven million years. The glaciers found in the park today are what remains from an ice advance known as the Little Ice Age. That period began about 4,000 years ago.

    During the Little Ice Age, the cold weather caused the ice to grow and advance. That situation continued until about 1,700s, when the climate began to warm. The higher temperatures caused the ice to start melting. That melting led the huge glacier to separate into more than 1,000 different glaciers.

    The extremely tall and jagged (参差不齐的) mountains seen in Glacier Bay National Park were formed by the ice advancing and then melting over time. The melting of the ice also created water that filled in and created the many fjords (峡湾) within the park. Fjords are narrow parts of the ocean that sit between cliffs or mountains.

    The huge amount of water from the melted ice killed off many kinds of plants. Vegetation returned to the area over the next 200 years. The regrowth in plants also brought back many animals to the land. This return of life to Glacier Bay is why it is sometimes called “a land reborn” by people.

    Mr. Parker was born in a small village. His father was so poor that he couldn't send him to school. The boy had to help his parents to do some farming and learned English and maths by himself when he was free. Later on he was made to leave his home village and hoped to find a job in a city. And as soon as war broke out, he joined the army. He couldn't forget his terrible past and fought with the enemies bravely. So he became a general when he was fifty. He was honest and friendly to his soldiers and often punished those who tried to pocket a portion of the soldiers' pay (克扣军饷). And his soldiers liked him very much.

    Once Mr. Parker heard from a soldier. In the letter the young man said the food in their military camp was very bad and he wished the general could go to find out the reasons, the old man went there at once, without telling anybody. He went in the kitchen and examined everything carefully and found it was very dirty. Then he went in the soldiers' bedrooms and found there were a lot of fleas. He became angry and asked the soldiers, “What do you think of your food, young men?”

    The soldiers saw their officer standing by the general and said nothing Only a new soldier said, “Very bad, sir!”

    “What did you have for lunch today?” asked Mr. Parker.

    “A fried chicken, some fish and pork, a cake, six eggs and I had three cups of wine.”

    “Really?” Mr. Parker called out in surprise. “It's the King's lunch, I think!”

    “So do I, general,” said the young man. “But it's my birthday today. I paid three hundred dollars for them all in the restaurant!”

    Reports tell us that Americans work more and vacation less than people in other major industrial countries. Still, millions of Americans do try to get away from home for a week or two in the summer months. Some might even have the time and money to spend longer on vacation.

    For example, many retired Americans can be found driving around the United States in big recreational vehicles, known as R. V.'s. These serve as a home away from home. In fact, it might even be their only home as they see the country.

    Some American families get in their cars and drive to historic places like Colonial Williamsburg in Virginia. There, they can experience what life was like for early Americans. If that is not exciting enough, also in Williamsburg is a water park and an amusement park with rides.

    Other Americans visit national parks like Yellowstone or Yosemite out in the West. They want to spend time with nature. Or they take their vacation by a lake or the ocean. They might swim or fish. But many just want to sit and enjoy the feeling of doing nothing, except maybe read a book.

    Some families fly to other countries on vacation. Or they go on a cruise ship (大型游轮) and stop in different ports. Cruise ships are like floating cities.

    But not everyone goes someplace special on vacation. This might be the only time for people to work on things like home improvement projects. And while they do that, they might think of all the fun their friends are having.

    There was a boy and his family was very rich. One day his father took him on a trip to a place. He wanted to show his son how poor people were there. They spent several days on a farm. There were many poor families living on the farm.

    On their way home, the father asked the son, “How was the trip?” “It was great, Dad,” the son answered. “Did you notice how poor people were there?” asked his father. “Oh, yes.” said the son. “So, tell me,” said his father. The son said, “Well, we have one dog and they have four. We have a pool in our garden, while they have a river that has no end. We have expensive lanterns, but they have stars above their heads at night. We have only a small piece of land to live on, while they have the endless fields. We buy our food, but they grow theirs. We have high walls around our houses to protect us, but they don't need walls, because their friends will protect them.”

    The father had nothing to say. Then the boy added, “Thank you, Dad, for letting me see how poor we are.”

    I do not know Sybrina Fulton. Nor can I claim to understand the depth of her pain. Yet, we share a deep connection. A common feature experienced by those women who face the challenge of raising a Black male child in a nation that far too often views Black male bodies through fear. You see, Ms. Fulton is living my nightmare (恶梦). A constant worry that has stayed in the back of my mind since the birth of my eldest son, some sixteen years ago.

    Through the years, I have witnessed the world's reaction to my son evolve as he has grown from a small boy to a young man. In his early years, his easy smile and lovable character were nothing less than magnetic (有磁性的). Complete strangers would approach him in the street, draw him into conversation, and find themselves easily struck by his lively spirit. Even at that time I worried, how would my son react when in the years to come some of those who found themselves so impressed by this cute, intelligent boy, might grasp their purse tighter as he walked by.

    Over the years I have sought to protect his spirit from the hurt that comes from undeserved hatred. I have also sought to arm him with the knowledge that could one day save his life. He knows, for example, that if he is ever pulled over by the police, that he is to keep both hands on the wheel at all times and only reach for his license when the officer is specifically observing his actions. He knows, even in less threatening situations, that rough play and loud interactions with his buddies of any color will be viewed very differently when he does it, than when his white friends display the very same behavior. Still, the truth of the matter is, no amount of advice or voiceless behavior overcomes the physical, immovable fact of the color of his skin. His intelligence, easy smile, and lovable character won't protect him from unfounded assumptions of criminality.

    What makes the Trayvon Martin travesty (歪曲) of justice so painful to me, personally, is the knowledge that Trayvon's mother loved her baby no less than I love mine. The various pictures of moments throughout a happy childhood that have now found a home on nationwide newscasts provides clear evidence of that. Yet no amount of love and care, and no words of advice could have saved her son from the cruel killing he faced at the hands of a self-appointed neighborhood watch-dog. And perhaps even worse, nothing could have prepared her for the inhuman way her son has been treated by officials even in death. To think for three long days, his parents searched for him while officials failed to inform them of his fate and instead, performed drug and alcohol tests on his lifeless body, while failing to do the same for his attacker—the only one of the two who indeed had a criminal past is frankly, unforgivable. To know that the words of her son's killer were given more weight than eye-witnesses and taped evidence of her child's screams and eventual death must be heartbreaking. But to also have to live with the fact that his attacker still breathes free while her son lays buried underground is certainly more than any sorrowful parent should have to endure (忍受).

    It is this type of pain that is not unfamiliar to the Black experience in America, for this is the Black mothers' burden. A burden we have endured for centuries. We know the pain of having our newborn babies grabbed from our loving arms to be sold into lifelong servitude (奴役) and to never again experience the warmth of a mother's loving hug. Yet, there is still the rightful expectation, that in modern-day America, the wheels of justice would not be stopped.

    So today, it is my hope that Trayvon's mother, father, family and friends can take some comfort in the fact that millions of Americans of every color stand with them in their fight for justice. This is a burden no family should have to endure alone.

    We will not give up.

    We will not forget.

    We will continue the fight until justice is done.

When it comes to sitting properly, we all know the correct way even if we don't do it to the letter. No crossed legs, bottoms touching the back of the chair and feet on the ground. But even if you're doing it right, sitting for long periods is shockingly bad for you. It has been described as the new smoking, linked to heart disease and even cancer. There is no doubt we should all try to do less of it. But perhaps we could also do it better.

A classic survey, published in 1953, described 100 different sitting postures adopted by 480 cultures around the world. Among the most common were sitting cross-legged, kneeling and the deep squat (深蹲), with feet flat on the ground and bottoms resting on or just above it. Even in Western cultures, these are preferred sitting positions among young children. But Westerners tend to prefer chair use from an early age, insisting children sit on seats in school.

One big problem with this desire for chairs is that they make sitting so, well, sedentary (久坐不动的). Consider the Hadza, a group of hunter-gatherer people in Tanzania. They spend around 9 hours a day sitting. However, they squat and sit on the ground in various positions, and this involves high levels of muscle activity. The supportive nature of chairs, with their high backs and armrests, removes this effort perhaps the reason that people love them.

So what's the best way to sit? Josette Bettany-SaItikov at Teesside University, UK has found that kneeling can help keep the spine in a better position as does squatting. We might also take inspiration from traditional cultures like the Hadza. "Use a variety of postures and preferably not just still postures but some which allow movement," says Bettany-Saltikov.

Bettany-Saltikov believes that we should be rethinking what it means to do a desk job. "We still need to design workplaces that enable people to be productive while being lightly active, like with under-table cycling or walking desks," she says. For now, if your job is sedentary, don't forget to stand up regularly and move around.