McElrah lost herfull-time job in January. Since then, she has spent her days doing what she loves-dancing in the street. Her message to people in hard times: do something that you enjoy, no matter what your circumstances. “ Life isn't that bad,” shesaid. “ If you're working 40 hours a week, you shouldn't be complaining.”

    McElrah graduated from parkway Central High School and has spent the past 21 years working as a nursing assistant, She began singing and dancing publicly on her days off a few years ago to help her through the pain of her second divorce.

    Her favorite spotis the northwest corner of Chouteau Avenue and South Grand Boulevard near St.Louis University. McElrah's mp3 player is loaded with hundreds of classic rockhits and 80's pop songs, including those by Joe Cocker, Tina Turner, NeilDiamond and Toto. But her favorite artist, by far, is Stevie Nicks.Videos of McElrah have appeared on YouTube, a video-sharing website on which users canupload, share, and view videos. “People think I'm crazy, but I don't care,” Shesaid. “ I can dance a little. I just go with the music.” Even a rude gesture from a passing motorist doesn't bother her either. “ I just smile and wave,”she said.

    McElrah's show of bravery recently earned her a job opportunity with Liberty Tax Service, which temporarily offered her a job as a dancer Statute of Liberty to promote a new place near Grand Center starting in January.

  “Just be happy anddo what you love,” she said. “The money will come.”

The weather is getting hotter and you'll be getting thirstier playing basketball or riding home from school. A cold drink may be just the thing. But be careful what you pour down your throat. Something that looks cool may not be good for your health.

    There are plenty of so-called energy drinks on the market. Most of them have an attractive colour and cool name. Their nutrition list also contains various things from vitamins to ginseng. Sounds great!

    But after a careful check you may find that most energy drinks contain high levels of caffeine. These drinks are typically aimed at young people, students, busy people and sports players.

    Makers sometimes say their drinks make you better at sports and can keep you awake. But be careful not to drink too much.

    Caffeine raises your heartbeat. Because of this, the International Olympic Committee has limited their use. The amount of caffeine in most energy drinks is at least as high as in a strong cup of coffee or strong tea.

    Research by Australian scientists has found that many teenagers are affected by caffeine. The results of their survey show that 27 percent of boys aged 8-12 take in more caffeine than their parents.

    There are potential health risks linked to energy drinks. Just one can of energy drink can make you nervous, have difficulty sleeping and can even cause heart attacks.

    Teenagers should be discouraged from consuming drinks with a lot of caffeine in them, an expert from the Australia Nutrition Foundation said.

    ARNOLD Schwarzenegger is back, once again taking on his iconic killer robot role, the T-800, in August's new movie Terminator Genisys. While the T-800 model—even if it can be evil—has a fond place in moviegoers' hearts, the reality of autonomous machines is no joke, according to scientists.

    Autonomous weapons use artificial intelligence (AI) to choose targets without human help. They were described as “the third revolution in warfare, after gunpowder and nuclear arms” in an open letter signed by over 1,000 important technology figures in July. The list included British scientist Stephen Hawking and Apple co-founder Steve Wozniak. They asked governments around the world to ban autonomous weapons, warning that killer robots could start ethnic cleansings and an arms race.

     “They will look like tanks. They will look like battleships. They will look like jet fighters,” UK robotics professor Noel Sharkey told CNET, a leading technology website.

    But unlike these machines, which require a human hand in their action, so-called “killer robots” would have some decision-making abilities and the ability to act on their own.

     “If any major military power pushes ahead with AI weapon development, a global arms race is almost inevitable,” said the letter released at the 2015 International Joint Conference on Artificial Intelligence in Buenos Aires, Argentina.

    The idea of an automated killing machine was made famous by Schwarzenegger's first Terminator movie in 1984. While no red-eyed robots have been sent after human beings, the idea of AI being used as a weapon has gotten much more likely in the years ever since. The US military is already developing autonomous flying vehicles that can carry out all the steps of a strike mission without a human controlling them, according to a May report in Nature magazine.

    Scientists have even painted a destructive picture of autonomous weapons falling into the hands of terrorists or warlords hoping to carry out ethnic cleansings.

     “The development of full artificial intelligence could lead to the end of the human race,” Hawking said to the BBC in 2016.

Authorities are gradually waking up to the risk of robot wars. Last May, for the first time, the United Nations brought governments together to begin talks on autonomous weapons systems.

    Still, a ban on autonomous weapons is “easier said than done”, commented The Guardian. The dual (双重的) uses of the AI technology—for harm and for good—is difficult to manage. This is because the exact same technology can be used in a wide range of ways, the paper said.

    I'll never forget the day when Mary came into my office and said, I am too old to learn how to use a computer. I shook my head. Here was a woman who had raised 6 children and who had made great progress in her career telling me that she was too old to learn something new. I told her that I always believed people were never too old to learn.

    Mary followed my advice and did learn how to use the computer. Now, she is retired and leading a very active life volunteering in her community( 社区 ),using her computer skills and helping anyone that needs help.

    When she was in her sixties, one day she called me and said she had played the piano for others all her life, and now she was going to make a CD of her own. My mind flashed back to the day when she told me she was too old to learn. You can imagine my surprise and delight.

    To produce the CD, she had a lot of things to learn. It was not just sitting at the piano and playing. She had to research the songs, learn about copyright(版权),and learn about marketing. It was pretty amazing for someone who once said she was too old to learn. And finally she made it. Now she has her own CD-Mixed Blessings.

    Most of you probably have heard about some people who have gone back to university in their seventies and have also graduated. They are on their way again to charging themselves with a new skill and a new attitude towards life. The point is you are unable to learn anything at any age if you believe you are too old. On the contrary, you can achieve anything at any age if you believe you can.

    Three men traveling on a train began a conversation about the world's greatest wonders.

    "In my opinion, "the first man said, "the Egyptian pyramids are the world's greatest wonder. Although they were built thousands of years ago, they are still standing. And remember: the people who built them had only simple tools. They did not have the kind of machinery that builders and engineers have today."

    "I agree that the pyramids in Egypt are wonderful," the second man said, "but I do not think they are the greatest wonder. I believe computers are more wonderful than the pyramids. They have taken people to the moon and brought them back safely. In seconds, they carry out mathematical calculations that would take a person a hundred years to do."

    He turned to the third man and asked, "What do you think is the greatest wonder in the world?"

    The third man thought for a long time, and then he said, "Well, I agree that the pyramids are wonderful, and I agree that computers are wonderful, too. However, in my opinion, the most wonderful thing in the world is this thermos."

    And he took a thermos out of his bag and held it up.

    The other two men were very surprised. "A thermos?" they exclaimed. "But that's a simple thing."

    "Oh, no, it's not," the third man said. "In the winter you put in a hot drink and it stays hot. In the summer you put in a cold drink and it stays cold. How does the thermos know whether it's winter or summer?"

The summer after my freshman year college, I had to get my first job. This was probably one of the1 tasks I have ever had to do. I had never held a job when I was in high school because my parents wanted me to put all my 2 into my studies. 

At first, it was very hard. I filled out dozens of 3 but got no calls back in the first two weeks. It made sense because I had 4 no job experience. All I could 5 was that being a high school graduate and a year of college. 

However, halfway through the third week, I finally got a call back from one of the places I 6 . We had set up a meeting time, and after my 7 , I was more than ready to start working the following Monday. I was 8 at the chance of working for my wages. 

When I started, it was very clear that I was not 9 . I made mistakes with orders and often 10 sales promotions（推销）. My parents made a bet I would not 11 the first two weeks, and I would be back looking for more 12 . However, I stuck with it. 

After working a while, I got better at orders, and always 13 the cheaper options for customers. A couple of weeks later, I had been told by the manager that I had 14 the award of the best employee of the month. It taught me a lot about responsibility and gave me the 15 of working.