A machine that takes sweat-laden (浸满汗水的) clothes and turns the sweat into drinking water is in use in Sweden. The machine makes the clothes turn round quickly, heats them to remove the sweat, and then passes the steam through a kind of special material to make purified water.

    Since it has been brought into use, its creators say more than 1000 people have drunk others' “sweat” in Gothenburg. They add the liquid is cleaner than local tap water.

    The device was built for the United Nations' child-focused charity UNICEF to promote a campaign highlighting the fact that 780 million people in the world lack access to clean water.

    The machine was designed and built by the engineer Andreas Hammar, known locally for his appearances on TV tech show “Mekatronik”. He said the key part of the sweat machine was a new water purification part developed by a company named HVR.

    “It uses a technique called membrane distillation (膜蒸馏),” he told the BBC. “We use a special kind of material that only lets steam through but keeps bacteria, salts, clothing fibers and other things out. They have something similar to the International Space Station, but our machine is cheaper to build. The amount of water it produces depends on how sweaty the person is, but one person's T-shirt typically produces 10ml, about a mouthful.”

    The device has been put on show at the Gothia Cup-the world's largest international youth football tournament. Mattias Ronge, chief executive of Stockholm-based advertising agency Deportivo, said the machine had helped raise awareness for UNICEF, but in reality had its limitations.

    “People haven't produced as much sweat as we hoped – right now the weather in Gothenburg is lousy,” Mattias Ronge said. “So we've equipped the machine with exercise bikes and volunteers are cycling like crazy. Even so, the demand for sweat is greater than the supply. And the machine will never be produced in large numbers, since there are better solutions out there such as water purifying pills.”

    Five weeks ago I had a total hip replacement surgery (髋关节置换手术). In Canada, we have great healthcare system. That means we get our new hips for free.

    My hip had been hurting me for years before I went to the doctor. Of course, it was free. She referred me to a surgeon, but the earliest appointment was in 10 months. That is what being free gets you. Ten months later, after some free X-rays, the surgeon told me I needed a surgery, which was about an 18-month wait, for some senior citizens had been on the operation list. Another 18 months! I dragged myself out of the surgeon, s office.

    Walking through the hospital, I thought about the situation. As the breadwinner of a large family, I couldn't wait that long, so I had to get to the front line. I was fully aware of what a Canadian should be like (Canadians are usually considered gentle and caring), but this time I really needed to fight for myself. At that very moment, in the shop window of the hospital, I saw a sign which read, “Volunteers Needed.” Suddenly, an idea occurred to me — I would get the job. Fortunately, they signed me up immediately because the average age of the volunteers at the shop was 75. They were desperate for some young blood.

    Every Friday morning, I was at the shop. While seeing the hospital staff, I'd casually ask, “What do you do?” Then I'd tell them, “Well, I'm getting my hip replaced — in 18 months.

    It's going to be so great when the pain stops.” Soon, all the staff got to know me. Naturally, in my next appointment, the surgeon recognized me. Moments later, I had a surgery date just weeks away.

    I had to say it was actually my volunteering that got me to the front of the line. And I'm not ashamed of it, for I intend to stick with the volunteering. Also, even when I cheated the system, I did it in a way that benefits society.

    My wife, daughter, and I moved into our home nine years ago and we spent a lot of time and energy in the yard to get it looking like the way it does today. We live on a corner, higher than street level, and the entire side of the yard is surrounded by a professionally built rock wall. The front of the house though is another story because instead of a wall along the sidewalk, the rocks appear to be just thrown up onto the dirt as if someone were in a hurry to finish.

    We did the best we could with what we had to work with and called this area our "rock garden". Whenever we had leftover flowers or plants, Denise or I would stick them out front, just to bring some color to the area. We would do all of the yard work on our own, even the tiring weed-pulling.

    Last summer I had reached the end of the rock garden and found a tiny little plant that I could not immediately identify, I knew I didn't plant it and Denise claimed that she didn't either. We decided to let it continue growing until we could figure out what it was.

    Weeks passed and as I made my way back to the mystery plant, it appeared to be a Sunflower with a tall skinny stalk（茎，杆）and only one head on it. I decided to baby it along and weed around it. As I pulled rocks from the area to get to the weeds, I noticed something unusual. The Sunflower had not started where I saw the stalk begin. It actually had begun under a big rock and grown under and around it to reach the sun.

    That's when I realized that if a tiny little Sunflower didn't let a big rock stand in its way of developing, we too have the ability of doing the same thing. Once our environment begins to see that we believe in ourselves like that little Sunflower, we can attain the same nourishment（营养）and growth as well.

    Stand tall like the Sunflower and be proud of who and what you are and the environment will begin to support you. You will find a way to go under or around your big obstacle in order to reach your desires.

    If you are in charge of a project, the key to success is getting everyone to want to help you. As a director, I point, I suggest, I gently push the actors in the direction I want them to go. In the 1986 movie, "Nothing in Common", Jackie Gleason's character, Max Basner, gets fired from his job as a clothing salesman. The scene, shot on a boat, shows Max's despair about being out of work. I was looking for some gesture that would allow Max to show his feelings.

    Jackie had far more experience at everything than I did, and at first I was frightened. What could I possibly tell "The Great One" about acting? Out of fear I decided to direct by suggestion, and I sat down with Gleason to talk about the scene. "So Max is sad, right?" I said.

    Gleason nodded.

    "And he's probably still carrying his pens with his name on them—the ones he used to hand out to his customers, right?"

    Gleason nodded.

    "So what would you want to do with the pens after you were fired?"

    He was silent for a moment. "Why don't I throw them overboard?"

    I stood up and turned towards the crew. "Hey, everybody, Jackie has a wonderful idea. Let's shoot it."

    After filming the scene, Gleason called me over and said with a smile. "Garry, what kind of wonderful idea am I going to have tomorrow?"

    You and your team can discover the answers to problems together. When there are no prizes or gold stars for those who get the solution first, you'll all benefit when everything turns out right.

Brilliant Ways to Deliver Secret Messages

Many effective ways are used now to deliver secret messages. But in the past when the science and technology was not developing, especially during the war, how did people send secret and important messages?

Shoelaces

In the 1950s, the U.S. Central Intelligence Agency created a book of tips to teach spies ways to communicate in public. One tip: Lace up your shoes. Tied one way, the laces might mean "I have information": tied another, "Follow me". The spies could communicate while everyone else probably thought, "That guy can't tie his shoes correctly!"

Tattooed (刺文身) Head

Around 513 B.C., Histiaeus was forced out as the ruler of an ancient city. So he wanted to send a message to his supporters: Rebel against the king who took away his power.

Histiaeus called in a slave, shaved his head and tattooed the message onto the man's skin on the top of head. After the slave's hair grew back, he travelled to Greece with orders to shave his head again. Message received!

Orange Juice

In 1597, John Gerard was imprisoned in the Tower of London in England. He asked the prison guard to let him send letters written in charcoal (木炭). But then he wrote another message on top using the juice from an orange-which was only visible when the juice was dry and the page heated. With his invisible ink, he escaped successfully.

Songs

In the 1800s, African American slaves couldn't talk openly about their plans to escape to freedom—so they secretly sang about it.

Swing Low, Sweet Chariot might sound like a religious song. But for slaves, the "sweet chariot" was the code for the Underground Railroad, the network of people who helped slaves head to northern states and Canada. The song Wade in the Water warned escaped slaves to get in the water so dogs wouldn't smell them. With these songs, hundreds of people escaped slavery.

Let's do something in our daily life for the environment and the earth.

An English teacher has introduced a play to her class.

Characters: Benny, Jerry, Susie, Grace

Time: One Sunday afternoon.

Place: By the river near their houses.

（The four teenagers have just finished the picnic. They are tidying up.）

Benny: Wow! That was a great picnic. I'm so full that I can hardly move.

Grace: That's no excuse for not tidying up, Benny. Come over here and help me pack（包装）up the leftover food. Jerry, please? And clean up the place.

Jerry: （Speaking unhappily to himself.）How can I always get the dirty and difficult jobs? It's not fair.

（Jerry throws a bit of water on the fire. Then he picks up the ashes（灰烬）with an old newspaper and wants to throw them into the long grass.）

Susie: （Sounding surprised）What are you doing, Jerry? That's d....

Jerry: Whoop...the paper has caught fire.

Susie: And the grass…Benny, Grace, help! Help!

（Benny and Grace come over quickly. They help put out the fire completely.）

Jerry: Oh, no. Oh, no! What have I done? 

Grace: You know that we should do everything carefully, don't you? 

Jerry: （With his head in his hands.）Yes. What have I done? What have I done?