One second-grade student wanted to help erase school lunch debt for her fellow students, so she decided to create lemonade stands to raise funds（资金）.

    Amiah Van Hill was inspired to raise funds to help pay off her classmates' lunch debt back in May after reading about Jeffery Lew. The father of three crowd-funded to cover the cost of unpaid lunches in the Seattle School District, where his 8-year-old son took part. “She's a really strong reader, so she read the story and said, 'Wow, this is great! I wonder if there's any kids at my school that need help paying their lunches,'” said her mother, Rachel Van Hill.

    Amiah, 6, and Aria, 4, discovered that at Hayden Meadows Elementary School in Idaho, the unpaid lunch debt was $40.55. They set up a lemonade stand last month to raise the money, with a sign reading, “Lemonade 4 Lunch.” During their first set-up, the two met their goal within an hour.

    The school was very much appreciative. Principal Lisa Pica said “Our school believes in giving back to the community and we are excited that Amiah has got that value at such a young age and we are so proud that she has found a way to help those in need. She is a very special little lady.”

    After discovering it was “easy” to pay off one school's debt, they set up another lemonade stand a week later to raise money for two more local schools. The girls then decided to set their sights higher and raise funds for the entire Coeur d'Alene Public School district. In 22 days, they've raised more than $2,700. The school district is excited to recognize her for her good deed.

    Summer vacation is coming. Most of students want to have a good trip this summer. Here is some information about trips for you

    We know that many animals do not stay in one place. Birds, fish and other animals move from one place to another at a certain time. They move for different reasons: most of them move to find food more easily, but others move to get away from places that are too crowded.

    When cold weather comes, many birds move to warmer places to find food. Some fishes give birth in warm water and move to cold water to feed. The most famous migration(迁移) is probably the migration of the fish, which is called “salmon”. This fish is born in fresh water but it travels many miles to salt water. There it spends its life. When it is old, it returns to its birthplace in fresh water. Then it gives birth and dies there. In northern Europe, there is a kind of mouse. They leave their mountain homes when they become too crowded. They move down to the low land. Sometimes they move all the way to the seaside, and many of them are killed when they fall into the sea.

    Recently, scientists have studied the migration of a kind of lobster(龙虾). Every year, when the season of bad weather arrives, the lobster get into a long line and start to walk across the floor of the ocean. Nobody knows why they do this, and nobody knows where they go.

    So, sometimes we know why humans and animals move from one place to another, but at other times we don't. Maybe living things just like travel.

    A girl had to usually face adversity(逆境). One day, she couldn't help complaining to her father about her life and how things were so hard for her. She didn't know how she was going to make it and wanted to give up. She was tired of struggling. It seemed as one problem was solved a new one arose.

    Her father, a chef, took her to the kitchen. He filled three pots with water and placed each on a high fire. Soon the pots came to a boil. In one he placed carrots, in the second he placed eggs, and in the last he placed ground coffee beans. He let them into the water and boil, without saying a word.

    The daughter waited impatiently, wondering what he was doing. In about twenty minutes he turned off the burners. He made the carrots out and placed them in a bowl. He pulled the eggs out and placed them in another bowl. Then he poured the coffee out and placed it in a cup. Turning to her, he asked, "What do you see?" "Carrots, eggs and coffee," she replied.

    He brought her closer and asked her to feel the carrots. She did and noted that they were soft. He then asked her to take an egg and break it. After pulling off the shell, she observed the hard-boiled egg. Finally, he asked her to sip the coffee. She smiled, as she tasted its rich aroma(香味). She humbly asked, "What does it mean, Father?"

    He explained that each of them had faced the same hardship, boiling water, but each reacted differently. The carrot had been strong and hard. But after being subjected to the boiling water, it softened and became weak. The egg had been easily broken. Its thin outer shell had protected its liquid interior. But after going through the boiling water, its inside became hardened. The ground coffee beans were unique. After they were in the boiling water, they changed the water. "Which are you?" he asked his daughter. "When adversity knocks on your door, how do you respond? Are you a carrot, an egg, or a coffee bean?"

    How about you, my friend? Are you the carrot that seems hard, but with pain and adversity you move back and become soft and lose your strength? Are you the egg, which starts off with a flexible heart? Were you a liquid spirit, but after a breakup, a divorce, or a layoff have you become hardened and stiff? Your shell looks the same, but are you bitter and tough with a stiff heart? Or are you like the coffee bean? The bean changes the hot water, the thing that is bringing the pain. When the water gets the hottest, it just tastes better. If you are like the bean, when things are at their worst, you get better and make things better around you.

    Ask yourself how you handle adversity. Are you a carrot, an egg, or a coffee bean?

    Researchers in China and the United States have developed a new cataract(白内障)treatment with cells that has restored vision in babies in a trial and may eventually be used in adults.

    The treatment-by doctors and staff members at the University of California, San Diego School of Medicine and Sichuan and Sun Yat-sen universities in China-was published in March 9 edition of the scientific journal Nature.

    A cataract is a clouding of the normally clear lens(晶体)of an eye. Typical cataract operation involves the removal of the cloudy lens and the insertion of an artificial one. The new operation has been tested in animals and during a small, human trial. It resulted in fewer complications(并发症)than the current harmful operation, and in regrown lenses with superior visual function in all 12 of the baby cataract patients who received the procedure.

    A congenital cataract-lens clouding that occurs at birth or shortly after- is important cause of blindness in children. In the new research, K and Zhang, head of ophthalmic genetics at US San Diego's Shiley Eye Institute, and his colleagues relied on the regrown potential of endogenous(同源的)stem cells.

    According to Zhang, endogenous stem cells are different from other stem cells that are typically grown in a laboratory, transplanted into a patient, and can have risks of immune（免疫的）rejection, infection or cancers. Zhang told CBS News, “We invented a new operation to make a very small opening at the side of a cataractous lens bag, remove the cataract inside, allow the opening to heal, and promote potential lens stem cells to regrow an entirely new lens with vision.”

    The human trial involved 12 babies under the age of 2 who were treated with the new method, while 25 babies received the standard operation care. The latter group experienced a higher incidence of post-operation danger, early- onset eye high blood pressure and increased lens clouding. The scientists reported fewer complications and faster healing among the 12 babies who has the new procedure.

    The world we live in gets more mechanized every year. Some countries which were mainly agricultural a hundred years ago have now become industrial. New factories and towns have been built on good agricultural land. There are now fewer farms to serve a much greater population, so these farms must be more efficient in order to produce as much food as possible. There is no place in the modern agricultural world for the inefficient farmer. Unfortunately, many of the picturesque aspects of farming are disappearing in the search for efficiency. The more tractors are used, the fewer horses are needed. Everyone agrees that horses are far more pleasant to look at than tractors. But they are less efficient. Cows are usually milked by machinery nowadays, and even pigs are fed automatically. There is not much art or poetry on the modern farm, and the old traditional idea of a farm as a slow, peaceful, romantic place is totally wrong nowadays.

    The modern farmer has to be a mechanic, a scientist, an accountant and a gambler. The more mechanized farming becomes, the more expert the farmer has to be. He must understand what machinery is necessary for his kind of farm, and he must know how to use it efficiently. He must also understand the new technical advances in agriculture, and how to use chemical and synthetic products to improve his crops. The more workers a farmer employs, the more he must know about the problems of wages and taxes. As in any other industry, most modern farmers find it necessary to employ office staff to deal with these. But although he has more modern equipments and far more scientific aids than his grandfather had, the farmer is still dependent upon the weather. As he can never be sure what the weather will do, he must be prepared to take risks, and face the possibility of losing everything.