Cheating can happen in a lot of different ways. When people cheat, it's not fair to other people, like the kids who studied for the test or who were the true winners of a game.

Many people like the action of cheating. It makes difficult things seem easy, like getting all the right answers on the test. But it doesn't solve the problem of not knowing the material and it won't help on the next test — unless the person cheats again.

    Some people lose respect for cheaters and think less of them. The cheaters themselves may feel bad because they know they are not really earning that good grade. And, if they get caught cheating, they will be in trouble at school, and maybe at home, too.

    Some kids cheat because they're busy or lazy and they want to get good grades without spending the time studying. Other kids might feel like they can't pass the test without cheating. Even when there seems to be a “good reason” for cheating, cheating isn't a good idea.

    If you were sick or upset about something the night before and couldn't study, it would be better to talk with the teacher about this. And if you don't have enough time to study for a test because of swim practice, you need to talk with your parents about how to balance swimming and school.

    A kid who thinks cheating is the only way to pass a test needs to talk with the teacher and his or her parents so they can find some solutions together. Talking about these problems and working them out will feel better than cheating.

    In the United States, when one becomes rich, he wants people to know it. And even if he does not become very rich, he wants people to think that he is. That is what “keeping up with the Joneses” is about. It is the story of someone who tried to look as rich as his neighbors.

    The expression was first used in 1913 by a young American called Arthur Momand. He told this story about himself. He began earning $ 125 a week at the age of 23. That was a lot of money in those days. He got married and moved with his wife to a very wealthy neighborhood outside New York City. When he saw that rich people rode horses, Momand went horseback riding every day. When he saw that rich people had servants, Momand and his wife also hired a servant and gave big parties for their new neighbors.

    It was like a race, but one could never finish his race because one was always trying to keep up. The race ended for Momand and his wife when they could no longer pay for their new way of life. They moved back to an apartment in New York City.

    Momand looked around him and noticed that many people do things just to keep up with rich lifestyle of their neighbors. He saw the funny side of it and started to write a series of short stories. He called it “Keeping up with the Joneses” because “Jones” is a very common name in the United States. “Keeping up with the Joneses” came to mean keeping up with rich lifestyle of the people around you. Momand's series appeared in different newspapers across the country for over 28 years.

    People never seem to get tired of keeping up with the Joneses. And there are “Joneses” in every city of the world. But one must get tired of trying to keep up with the Joneses because no matter what one does, Mr. Jones always seems to be ahead.

    It is not easy getting the attention of tourists away from the well-known white sandy beaches of Byron Bay. But in this relying Australian surf town, a solar (太阳能的)-powered train might just do a good job.

    Opening to the public in December 2017 along a 1.9-mile-long stretch (一段) of track that sat abandoned for more than a decade, the Byron Bay Rail Company has breathed new life into a pair of disused railcars dating back to the 1940s. They're now used to transport passengers between Byron Bay's central business district and the North Beach area. After remaining in service as part of a regional passenger rail network until the early 1990s, the aging railcars were out of service and sat uncared for — almost destroyed by time and unpleasant Aussie climate — in a railyard for more than 20 years. You'd never know it by looking at these nearly 70-year-old workhorses today, though: they've been decorated, equipped, topped with custom-made photovoltaic panels (定制的光电池板) and rearranged to accommodate up to 100 seated beach goers.

    It's those train-top PV panels that truly set the Byron Bay Rail Company's flagship train apart from other heritage rail restoration projects.

    Drawing additional power from a 30-kilowatt solar array (阵列) located atop the train's storage building, the tain is said to be the first in the world to be completely powered by the sun. Solar energy caught by the 6.5-kilowatt train-top solar panels is stored directly in an onboard battery system that powers motors, lighting and the like. When stopped at its home platform, the train pushes into chargers for quick battery top-offs with electricity produced by the storage building's rooftop solar array. The 77 kilowatt-hour battery can hold enough juice for 12 to 15 runs on a single charge. During long periods of cloudiness when the solar arrays don't get enough sun, the train uses the main electric network, supply using renewable energy sold by community-based service Enova Energy.

    The Byron Bay Rail Company's first-in-the-world folly solar-powered train is a good example of historic rail preservation with a 21^st century development. Operating as a not-for-profit company, the Byron Bay Rail Company also expected the AU$4 million line to be a way to relieve traffic jam between downtown Byron Bay and the rapidly growing North Beach area. Really, there's no bigger unpleasant thing than sitting in bad traffic for 40 minutes trying to get to the beach.

    Since 50 years ago, scientists have been searching for ways to link the brain with computers. Brain Computer Interface (BCI) technology could help people with disabilities send commands to machines.

    Recently, two researchers, Jose Millan and Michelle Tavella from the Federal Polytechnic School in Lausanne, Switzerland, demonstrated (展示) a small robotic wheelchair directed by a person's thoughts.

    In the laboratory, Tavella operated the wheelchair just by thinking about moving his left or right hand. He could even talk as he watched the vehicle and guided it with his thoughts.

    "Our brain has billions of nerve cells. These send signals through the spinal cord (脊髓) to the muscles to give us the ability to move. But spinal cord injuries or other conditions can prevent these weak electrical signals from reaching the muscles," Tavella says, "Our system allows disabled people to communicate with external world and also to control devices."

    The researchers designed a special cap for the user. This head cover picks up the signals from the scalp (头皮) and sends them to a computer. The computer interprets the signals and commands the motorized wheelchair. The wheelchair also has two cameras that identify objects in its path. They help the computer react to commands from the brain.

    Prof. Millan, the team leader, says scientists keep improving the computer software that interprets brain signals and turns them into simple commands. "The practical possibilities that BCI technology offers to disabled people can be grouped in two categories: communication, and controlling devices. One example is this wheelchair." He says his team has set two goals. One is testing with real patients, so as to prove that this is a technology they can benefit from. And the other is to guarantee that they can use the technology over long periods of time.

    Cli-Fi refers to "climate fiction"; it is a term invented by journalist Dan Bloom. These are fictional books that somehow or someway bring real climate change science to the reader. What is really interesting is that Cli-Fi books often present real science in a believable way. They become fun teaching tools. There are some really well known authors such as Paolo Bacigalupi and Margaret Atwood. A list of other candidate Cli-Fi novels was provided by Sarah Holding in the Guardian.

    What makes a Cli-Fi novel good? In my opinion, it has to have some real science in it. And it has to get the science right. Second, it has to be fun to read. When done correctly, Cli-Fi can connect people to their world; it can help us understand what future climate may be like, or what current climate effects are.

    One thing that is hard to imagine is the future. What will the world be like decades from now when Earth temperatures have continued to rise? What will agriculture be like? What will coastal communities be like? It is also hard to imagine what living a subsistence agriculture life is like, today. What happens to lives and communities when the rains change, or don't come at all? What would that world look like?

    One recent example of Cli-Fi literature is South Pole Station by Ashley Shelby. In this book we follow Cooper Gosling, who is traveling to a research location on Antarctica to create paintings. Yes, an artist is sent to live with researchers and crew ­ with funding from the National Science Foundation. After arriving at the South Pole, Cooper has to become acquainted with the strange social system that exists there. Ashley writes the book in such a way that you actually feel you are huddled(拥挤) in the cold with her and her co-workers.

Everything to know about Singapore

Here is how to plan the best possible trip to this impressive city-state.

When to go

Positioned just one degree north of the Equator, Singapore is consistently tropical. So it's more a matter of when not to go. Namely: the monsoon season between November and January when the city is blanketed in regular rainfall.

What to celebrate

Singapore celebrates its independence in an annual celebration known as National Day. Every year on August 9, the holiday is marked with great excitement that extends into the evening, ending in a massive fireworks display over Marina Bay.

What to eat

Hainanese chicken rice is considered the national dish of Singapore, as you can find it just about everywhere. If you are looking for something a bit spicier, try laksa--a coconut curry-based noodle soup.

Souvenir to take home

The Merlion is Singapore's official mascot(吉祥物), a mythical beast with the head of a lion and the body of a fish. Many local salesmen offer hand-carved figurines that fit easily into carry-on luggage and will serve as a lasting symbol of your time here. Anyone who's ever visited this place directly connects the symbol to the city.

Travel trip

Hawker centers are open-air food markets featuring delightful street food. Eat at these as much as possible to support local business and for a true taste of Singaporean dining customs. While each has its own charm, Maxwell Road Hawker Center in Chinatown is the most famous.

Instagram-worthy view

A photo from the world's largest rooftop infinity pool-- connecting the three towers of the Marina Bay Sands-- is a must for many tourists here. But back on the ground, Merlion Park affords a more impressive view of the hotel itself.