When seeing the doctor, you feel better to know you will get some medicine. But the doctor knows that medicine is not always needed. Sometimes all a sick person needs is some reassurance (安想) that all will be well. In such cases the doctor may prescribe a placebo.

    A placebo is a sugar pill, a harmless shot, or an empty capsule. The patient thinks it is medicine and begins to get better. How does this happen?

    The study of the placebo opens up new knowledge about the way the human body can heal itself. It is as if there was a doctor in each of us. The doctor will heal the body for us if we let it. But it is not yet known just how the placebo works to heal the body. Some people say it works because the human mind fools itself. These people say that if the mind is fooled into thinking it got medicine, then it will act as if it did, and the body will feel better.

    Placebos don't always work. The success of this treatment seems to rest a lot with the relationship between the patient and the doctor. If the patient has lots of trust in the doctor and if the doctor really wants to help the patient, then the placebo is more likely to work. So in a way, the doctor is the most powerful placebo of all.

    A placebo can also have bad effects. If patients expect a bad reaction to medicine, then they'll also show a bad reaction to the placebo. Some doctors still think that if the placebo can have bad effects it should never be used. They think there is still not enough known about it.

    The strange power of the placebo does seem to suggest that the human mind is stronger than we think it is. There are people who say you can heal your body by using your mind. And the interesting thing is that even people who swear this is not possible have been healed by a placebo.

    When I lived in Spain, some Spanish friends of mine The family you have chosen decided to visit England by car. Before they left, they asked me for advice about how to find accommodation. I suggested that they should stay at 'bed and breakfast' houses, because this kind of accommodation gives a foreign visitor a good chance to speak English with the family. My friends listened to my advice, but they came back with some funny stories.

"We didn't stay at bed and breakfast houses," they said, "because we found that most families were away on holiday."

I thought this was strange. Finally I understood what had happened. My friends spoke little English, and they thought 'VACANCIES' meant 'holidays', because the Spanish word for 'holidays" is 'vacancies'. So they did not go to house where the sign outside said 'VACANCIES', which in English means there are free rooms. Then my friends went to house where the sign said 'NO VACANCLES', because they thought this meant the people who owned the house were not away on holiday. But they found that these houses were all full. As a result, they stayed at hotels!

We laughed about this and about mistakes my friends made in reading other signs. In Spanish, the word 'DIVERSION' means fun. In English, it means that workmen are repairing the road, and that you must take a different road. When my friends saw the word 'DIVERSION' on a road sign, they thought they were going to have fun. Instead, the road ended in a large hole.

English people have problems too when they learn foreign languages. Once in Paris, when someone offered me some more coffee, I said "Thank you" in French. I meant that I would like some more. However, to my surprise the coffee pot was taken away! Later I found out that "Thank you" in French means "No, thank you."

    To personal trainer Sammy Callari, 13-year-old Parker Seward is more than a client(客户). He's his "little brother". Over the past year, the pair have bonded. They play basketball together, share meals and dance to hip-hop like no one's watching.

    The trainer was asked to work with the 13-year-old boy, who has Down syndrome(唐氏症), because his coworker who dealt with the boy was out of town last spring. Callari had never worked with someone with a disability before. He was anxious the first day he met Parker. But Parker's big smile and cheery introduction immediately put him at ease. He reminded Callari of himself when he was a teenager. Like Parker, Callari has also faced his fair share of challenges over the years.

    As a high schooler, Callari described himself as being the weak kid. When it came to sports, he was always overlooked. His dream of playing baseball in college quickly faded away. When he went to college, Callari turned to a new sport. His younger brother trained him to become a boxer. Callari participated in five matches. Out of four of those fights he was the underdog, and he won three times. "I know how it feels," Callari said. "Society tells you that you can't do this, you can't do that." When it comes to Parker, Callari refuses to accept the word "can't".

    The friends meet twice a week to train. They bike, box, run and work on their core with push-ups. Parker has a short attention span, so it's Callari's job to keep him focused. "If Parker can do it, if he's having fun, even with his frustration, then people will ask, "Why can't I do that?" Callari said. "That's the whole task right now."

    Callari recalls Parker's mom once thanking him for taking a "chance" on her son. Callari told her he never viewed it that way. Parker may be the student, but Callari says he's also the one who's learning.

    The English language has a lot of words which can be used in many different ways and in many different experiences.

    One such example is the word matter. In fact, matter can mean just about anything. It could be one of the most useful words in the English language.

Let's get to the heart of the matter —- a matter of principle(原则).

    If someone says that you owe(欠) him $50, but you don't, a friend might say, "Well, you could pay him the $50. It's not that much money. Then you won't have to hear him say it anymore." But if you do not owe him the money, do not pay him the money. It's a matter of principle.

    There is another way to use the word matter. But be careful with your choices of words.

    If you ask someone, "What's the matter?", it shows you are worried about the other person. But saying, "What's the matter with you?" has a completely different meaning. And it usually sounds rude. In fact, when you say, "What's the matter with you?", you are suggesting that the person did something wrong or stupid.

    Another expression that could sound rude is to say, "It doesn't matter to me." Here, it depends on the context, and how you say it.

    Let's say you tell someone that a friend just got a big raise at work. That person answers with, "It doesn't matter to me." Here, it means he or she does not care. And it sounds rude.

    But saying, "Oh, you pick where we eat dinner. It doesn't matter to me." does not sound rude. In the situation, "it doesn't matter" shows you are easy-going.

    No matter how you look at it and what you say, matter is a very useful word. And it's only a matter of time before you will become an expert on the use of matter.

    Africa is a very diverse land with many different tribes. One tradition that many of these groups share is painting or marking their bodies and faces in color. They do this for many reasons. Some marks are used to identify people as part of the group. Other marks are used for ceremonies such as wedding and during times of war. Let's look at some different examples of body painting.

    Red is a common color in body painting because it often represents health and long life. Among the Masai of East Africa, when men are old enough to marry and make decisions for their people, they participate in a special ceremony in which they paint their heads and faces red. This ceremony takes place every seven to fourteen years, so there is not an exact age for participating in it.

    The Samburu, also from East Africa, like to paint their faces and hair red because they think it looks pretty.

    The Masai men also have a unique way of showing that they are brave. To show that he has killed a lion, a man will paint his body with a natural white material, making special marks to represent this accomplishment. The Masai men also use this white to show that they are no longer boys and are considered adults.

    One quite unusual example of face painting is done by the Wodaabe people of West Africa. Once a year, they have a beauty contest for men. The men paint their faces yellow and red. Then they add white and black circles and lines. Black paint is used near the eyes and on the lips to draw attention to the whiteness of their eyes and teeth, which the Wodaabe consider most beautiful. The women then decide which man they like best.

    As you travel, enjoy the beautiful and bright colors of Africa.

After a long and hard journey that made international headlines, China's famous herd of wandering elephants appears to finally be heading home.

In August, the 14 Asian elephants of various sizes and ages were guided across the Yuanjiang river in Yunnan and a path was being made for them to return to the nature reserve in the Xishuangbanna Dai Autonomous Prefecture.

The elephants' return completes a more than 500km odyssey that caught the attention of the country. The highlights of their trip included the birth of a calf in Pu'er in last November; and going viral for taking a nap. If they were just taking a walk in the forest, it wasn't a big deal. But the fact is, they left whatever they stepped on in ruins, causing great damage to local residents.

Local wildlife experts have been unable to pinpoint the reason the herd decided to move. One reason is given that the population of elephants in the nature reserve in the Xishuangbanna Dai Autonomous Prefecture is so large, which has increased from 190 to over 300 since 40 years ago, that there is not enough food for them. Some say that their move is due to the influence of the magnetic field of the earth and there is another story saying maybe that lead elephant lost its way, thus leading the herd out of the way. But Zhang Li, a professor on conservation biology at Beijing Normal University, told the Global Times in June that large-scale human engineering developments have sped up the ‘islanding'of elephant habitats.

This meant "the traditional safe zones between humans and elephants are gradually disappearing, and the chances of elephants encountering humans naturally increase greatly".