Expensive perfumes (香水) come in tiny bottles, but many hide a whale-sized secret.

    To perfect a particular smell, perfume-makers often use an ingredient that comes from sperm whales, called ambergris (龙涎香). But using ambergris, which helps a perfume last longer, is strongly opposed by many people who think it is wrong to kill whales just so we can smell sweet. Joerg Bohlmann is neither a perfumer nor a whale expert. He's a plant biologist at the University of British Columbia in Canada. But his discovery of a new plant gene (基因) might push whales out of the perfume business.

    The gene comes from fir trees, found throughout North America and commonly used as Christmas trees. The trees produce a chemical that can be used in perfume in place of ambergris-but with a catch. "There's a problem that many people wouldn't consider. In the tree, the chemical is mixed with many others. That makes separation a challenge," Bohlmann says. "lt's like trying to isolate sugar from a biscuit. "

     This is where science becomes useful. When Bohlmann learned that fir trees produce the ambergris-like chemical, he decided to use his gene know-how to find the instructions for how to make the ambergris-substitute.

    Bohlmann found that gene and took it out of the tree cells. Then he did something that might sound strange to someone who doesn't work in genetics: Bohlmann put the gene from the tree into yeast (酵母) cells.

    Yeast may sound familiar because it's used to make things like bread, wine and beer. Biologists like to work with yeast because it easily adopts new genes and changes its features and behaviour. When Bohlmann put the fir tree gene into the yeast, the yeast started making the same chemical that had been produced by the tree.

    Perfumers pay big money for ambergris because it is a fixative, which means it holds a smell in place on a person's body.

    "Cheap perfumes smell good in the first hour or so and then everything is gone," explains Bohlmann. "But expensive perfumes are much more stable.  Their smell lasts much longer, for hours or even a day after you apply them. "

    The new chemical, made from the tree genes, can be used as a fixative, too. And using yeast to make it is far cheaper than acquiring ambergris.

    Bohlmann admits he never thought he'd get into the perfume business. But now, he says, producers have been calling to find out how to use his technology in new perfumes.

    Here is an astonishing and significant fact: Mental work alone can't make us tire. It sounds absurd. But a years ago, scientists tried to find out how long the human brain could labor without reaching a stage of fatigue (疲劳). To the amazement of these scientists, they discovered that blood passing through the brain, when it is active, shows no fatigue at all! If we took a drop of blood from a day laborer, we would find it full of fatigue toxins(毒素) and fatigue products. But if we took blood from the brain of an Albert Einstein, it would show no fatigue toxins at the end of the day.

    So far as the brain is concerned, it can work as well and swiftly at the end of eight or even twelve hours of effort as at the beginning. The brain is totally tireless. So what makes us tired?

    Some scientists declare that most of our fatigue comes from our mental and emotional(情绪的) attitudes. One of England's most outstanding scientists, J.A. Hadfield, says, “The greater part of the fatigue from which we suffer is of mental origin. In fact, fatigue of purely physical origin is rare.” Dr. Brill, a famous American scientist, goes even further. He declares, “One hundred percent of the fatigue of sitting worker in good health is due to emotional problems.”

What kinds of emotions make sitting workers tired? Joy? Satisfaction? No! A feeling of being bored, anger, anxiety, tenseness, worry, a feeling of not being appreciated—those are the emotions that tire sitting workers. Hard work by itself seldom causes fatigue. We get tired because our emotions produce nervousness in the body.

    Banker Chip Paillex had never planted so much until he moved to the countryside in Pittstown, New Jersey, seven years ago. Surrounded by working farms, he quickly became interested in the grow-it-yourself idea and rented a piece of 30-by-30-foot land. He planted tomatoes, eggplants and other vegetable—enough to feed his family of four for the summer. He ended up with so much produce; he couldn't give it away. He found a local food factory and donated 120 pounds of fresh vegetables.

    The following year, with a handful of volunteers and a memorable name—America's Grow-a-Row, Paillex harvested 1, 500 pounds of fresh vegetables, all of which he donated to area food banks--places that give food to poor people. Soon Paillex had a hundred volunteers and needed more land. He visited Meredith and Jeremy Compton, who farm Peaceful Valley Orchards in Pittstown. Could he work their land?

    “I guess we were feeling honored, " says Meredith. Not only do the Comptons welcome Grow-a-Row volunteers, they also work on the land.

    What began with a few empty fields has turned into a large local farm. This year, Grow-a-Row will deliver about 250, 000 pounds of fresh produce to food banks. Their secret for getting all of this done? Family power. " Each week, a couple of families 'own' the garden, " says Paillex." They water, pick, and deliver, and then hand it off on Sunday night to the next group of families."

    Paillex also welcomed local school kids. On a Friday morning in May, some kids worked on a field. "We' re growing food, " one fifth grader said proudly.

    "The program shows kids that there are people in need, " says Paillex. “When these kids become tomorrow's leaders, they'll be much more likely to encourage their co-workers or employees to get involved in something like this. “

    "Chip makes people want to help, " says Colleen Duerr, a mother of two. "And families love this. Chip has given us a way to raise our kids with a giving heart. "

    “To another little girl.”

    That's what 3-year-old Ariana of Winterport, Maine, said when her father Josh Smith asked where her donated (捐赠的) hair was going to go. It was then that the dad of two realized his young daughter had a heart that was too big for words.

    “I run a charity called Extra Life where I play video games to help raise money for kids,” he said. “Ariana happened to be sitting next to me when a video was playing, showing a little girl who was bald(秃顶的), lying in a hospital bed with tubes in her.” When their daughter got curious, Smith and his wife Crystal explained how medicine was what made the child in the video lose her hair.

    “Without a second thought, Ariana said, 'She can have some of my hair,'” Smith said. “That's when my wife told me that there are many organizations that we could donate it to.” The Smiths chose “Locks of Love” to send Ariana's generous gift to a child with medical hair loss.

    A week later, Ariana was taken to the family hairdresser where 10 inches was cut from her hair.

    “It was her first haircut,” Smith told ABC News. “She can be so selfless like that. Her first reaction is 'How about me giving up something that I have, so a little girl can feel pretty?'” Smith posted his daughter's moving gesture on his personal webpage, where it has received almost 645,000 views in just two days.

    “She'll take an adult-like approach and it's really amazing,” Smith said. “She is just a little kid, but if she sees somebody in need, she certainly cares for them. This made Ariana feel special and she'd definitely like to do it again.”

    Many people believe that you lose the ability to learn new languages as you get older. Language experts, however, will tell you that you're never too old to learn a new language. As you get older, it can be more difficult to learn a new language, though.

    Children and adults learn new languages in different ways．For children, language is their life. They study for thousands of hours every year, because they need to learn languages to become part of their communities. Adults, on the other hand，are already part of a language community. Learning a new language means becoming part of another language community, and adults seldom get the chance to practice as much as young children do.

    Moreover, children learning a new language are expected to make mistakes. This gives them freedom when learning to be daring and confident. Adults, however, often feel pressured to be perfect when learning a new language. This can discourage many people and make it even harder to learn a new language.

    Research has shown that children who learn a new language when they are very young will not be likely to have a “foreign” accent when speaking a different language. Some scientists also believe that it can take up to 10,000 hours of study to master a new language. This can be difficult for adults to achieve, but young children can accumulate(积累) those hours over several years as they grow up.

    When young children learn a new language, they come to see multiple languages as a “normal” part of society. This mindset (思维模式) helps them learn a new language without feeling like they're doing something unusual or “too hard”.

    So if you want to learn a new language, go for it! It's never too late to learn a new language. If you're older, it may take more work, but it can be done. If you're a young child, though, now is the time to step out and learn a new language!

    An old farmer lived on a farm with his young grandson. Each morning Grandpa was up early to read his holy. His grandson wanted to be just like him and tried to imitate him in every way he could.

    One day the grandson asked, "Grandpa! I try to read holy（圣书） just like you but I don't understand it, What good does reading the holy do?"

    The Grandfather quietly turned from putting coal in the stove and replied, "Take this coal basket down to the river and bring me back a basket of water." The boy did as he was told, but all the water leaked out (漏出) before he got back to the house. The grandfather laughed and said, "You'll have to move a little faster next time," and sent him back to the river with the basket to try again. This time the boy ran faster, but again the same took place. He told his grandfather that it was impossible to carry water with a basket.

    The old man said, "You're just not trying hard enough," So the boy again dipped the basket into the river and ran hard, but when he reached his grandfather the basket was again empty, he said, "See Grandpa, it's useless!", "So you think it is useless?" The old man said, "Look at the basket."

    The boy looked at the basket and for the first time realized that the basket was different. It had been changed from a dirty old coal basket into a clean one inside and outside.

    "You might not understand or remember everything, but when you read it, you will be changed, inside and out. That is the work of Krishna in our lives."