When someone is happy, can you smell it?

    You can usually tell when someone is happy based on seeing them smile, hearing them laugh or perhaps from receiving a big hug. But can you also smell their happiness? Surprising new research suggests that happiness does indeed have a scent, and that the experience of happiness can be transmitted through smell, reports Phys.org.

    For the study, 12 young men were shown videos meant to bring about a variety of emotions while researchers gathered sweat samples from them. All of the men were healthy and none of them were drug users or smokers, and all were asked to abstain from drinking or eating smelly foods during the study period. 

    Those sweat samples were then given to 36 equally healthy young women to smell, while researchers monitored their reactions. Only women were selected to smell the samples, apparently because previous research has shown that women have a better sense of smell than men and are also more sensitive to emotional signaling—though it's unclear why only men were chosen to produce the scents.

    Researchers found that the behavior of the women after smelling the scents—particularly their facial expressions—indicated a relationship between the emotional states of the men who produced the sweat and the women who sniffed them. 

    “Human sweat produced when a person is happy brings about a state similar to happiness in somebody who breathes this smell,” said study co-author Gun Semin, a professor at Koc University in Turkey.

    This is a fascinating finding because it not only means that happiness does have a scent, but that the scent is capable of transmitting the emotion to others. The study also found that other emotions, such as fear, seem to carry a scent too. This ensures previous research suggesting that some negative emotions have a smell, but it is the first time this has proved to be true of positive feelings.

    Researchers have yet to isolate(分离) exactly what the chemical compound for the happiness smell is, but you might imagine what the potential applications for such a finding could be. Happiness perfumes, for instance, could be invented. Scent therapies（香味疗法）could also be developed to help people through depression or anxiety.

    Perhaps the most surprising result of the study, however, is our broadened understanding of how emotions get communicated, and also how our own emotions are potentially managed through our social context and the emotional states of those around us. 

    Do you drink water that's been left sitting out overnight or even for another day? Have you noticed it tastes different?

    Tap water that has been left to sit out slowly begins to acquire(获得) off taste. Many people think that this is because of microorganisms. But that's not what makes old water taste not fresh. For that we can thank carbon dioxide. After about 12 hours, tap water starts to go flat as carbon dioxide in the air starts to mix with the water in the glass, lowering its pH and giving it an off taste. But it's most likely safe to drink.

    However, back to those microorganisms. If you use a dirty glass day after day, there is more of a chance of bacteria making themselves known; a risk that increases if you share the glass with another mouth as well. But assuming(假设) you use a fresh glass every few days, you probably won't have a problem unless the glass has been touched by dirty fingers, and especially if those dirty fingers went unwashed after using the bathroom.

    As for plastic water bottles that have been left out in the sun or in the car, step away from the bottle, warns Dr. Kellogg Schwab, director of the Johns Hopkins University Water Institute. "A chemical called biphenyl-A, or BPA, along with other things used to make plastic can leach(过滤) into your water if the bottle heats up or sits in the sun," he explains. BPA, as you probably know, has been linked to everything from heart disease to cancer. Schwab also adds that plastic used for commercial bottled water isn't meant to be washed or refilled, so use only one time and recycle. Or don't buy them at all; use refillable water bottles instead.

    Parents can cut the chances of their children getting fat simply by keeping them longer at table. Just three minutes extra at a family mealtime could help prevent child obesity. Research found that among poor families, the extra minutes at mealtimes made great improvement of a normal weight for the youth. The factors are likely to be communication and the importance of a scheduled mealtime.

    Dr Barbara Fiese said, “Children, whose families have a 20-minute meal over four times a week, weigh less than kids who leave the table after 15 to 17 minutes. Over time, those extra minutes per meal add up and become really powerful.”

    The researchers studied 200 family mealtimes, testing the effects of factors and mealtime behavior of families with children in primary school. They found that families, who said that shared mealtimes were an important part of family life and had special meaning for them, were less likely to have an obese child. Similarly, families, who talked more together and interacted more positively during the meal, were more likely to have healthy-weight children.

    Teaching low-income families how to make the most of family mealtimes was a wise idea. Dr Fiese said, “This is something we can target and teach.” She added, “It's also important to recognize the increasing differences of families and their sometimes complex living arrangements that may challenge their abilities to plan ahead and arrange a single time to communicate with each other.”

    Families in poorer US neighborhoods faced a lot of problems, including poor access to healthy food. But even so, regular high quality family mealtimes made a difference to the children's weight. Dr Fiese said, “Three to four extra minutes per meal will make a healthy weight more possible.”

    Spring is coming, and it is time for those about to graduate to look for jobs. Competition is tough, so job seekers must carefully consider their personal choices. Whatever we are wearing, our family and friends may accept us, but the workplace may not.

    A high school newspaper editor said it is unfair for companies to discourage visible tattoos (纹身)，nose rings, or certain dress styles. It is true you can't judge a book by its cover, yet people do "cover" themselves in order to convey certain messages. What we wear, including tattoos and nose rings, is an expression of who we are. Just as people convey messages about themselves with their appearances, so do companies. Dress standards exist in the business world for a number of reasons, but the main concern is often about what customers accept.

    Others may say how to dress is a matter of personal freedom, but for businesses it is more about whether to make or lose money. Most employers do care about the personal appearances of their employees, because those people represent the companies to their customers.

    As a hiring manager I am paid to choose the people who would make the best impression on our customers. There are plenty of well-qualified candidates, so it is not wrong to reject someone who might disappoint my customers. Even though I am open-minded, I can't expect all our customers are.

    There is nobody to blame but yourself if your set of choices does not match that of your preferred employer. No company should have to change to satisfy a candidate simply because he or she is unwilling to respect its standards, as long as its standards are legal.

    Everybody hates the idea of cutting back financially(财政上) because it usually means living without things you like. But not always.{#blank#}1{#/blank#}.They could reduce your costs by thousands of dollars a year.

    {#blank#}2{#/blank#}

    An increasing number of grocery chains are selling their own lines of food. Actually, these brands cost vastly less than the name brands, but taste the same. Switch and you could save 25 percent on your grocery bills.

    Make a list.

    Whether you're buying groceries or gifts, spur－of the－moment impulses(一时冲动)are your enemy.{#blank#}3{#/blank#}. If you want to buy something on impulse, force yourself to go home and think about it.

    Carry snacks.

    {#blank#}4{#/blank#}. The same holds true for anything you eat out. So if you know you're going to be out for several hours and likely to get hungry, throw an apple in your car or carry a six-pack of soda or water in your bag.

    Use it up.

    Before you run to the store, make sure you check your fridge. There's a good chance that you've got lots of unused or partially used items that will go to waste while you waste your cash buying more.{#blank#}5{#/blank#}.

A. Make a savings plan

B. Switch to store brands

C. There are many painless ways to save

D. Choose reliable brands of well-known companies

E. Write a to-do list before you go shopping and stick to it

F. Whether it's food or beauty care, use it up before you replace it

G. Buy a soda at a restaurant and you're likely to pay twice as much

Being a Volunteer

    What can you do to help people? The answer is ——to be a volunteer! Then what is the common opinion of volunteering? {#blank#}1{#/blank#}

    Help yourself by helping others.

    {#blank#}2{#/blank#}It's amazing to know that volunteering can calm you down when you feel upset. Lots of people really enjoy volunteering, because doing volunteer work could make a big difference in their life. So where do you start? School is a good place to start if you are looking for volunteer ideas.

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    Volunteering is a great way to have fun with your family. Talk to your parents, brothers, or sisters and see what they might be interested in. Find something you all agree on. You can do the things as a family like cleaning up a park and planting trees or flowers in your local community(社区).

    Create your own opportunity for your future.

    Kids can come up with their own ways to raise money or provide needed services. You can make and sell products, and donate(捐赠) the money. {#blank#}4{#/blank#} Volunteering can also help kids learn important things about their future —— like what kinds of things they will be best at. A volunteer job can even help some kids decide what they want to do when they grow up. {#blank#}5{#/blank#}Make a plan to start volunteering today!

A. So what are you waiting for?

B. Things to do with family members.

C. Clean up a school or other public buildings.

D. Volunteering gives kids a sense of responsibility.

E. Why don't you choose to do a job you like best?

F. Volunteering means spending time in helping others.

G. When you volunteer to help others, you are helping yourself.