The mobile phone has become a problem for high schools. Some high-school students in Australia are not allowed to carry mobile phones during school hours.

    The mobile phone used among children has become a problem for the school years. Several children have got mobile phones as Christmas presents, and more students want them. Marry Brown, a headmaster, said that the mobile phone was a distraction to students during school hours and it also gave teachers so much trouble in their classrooms. Teachers also say that sometimes students might use phone messages to cheat during exams.

    She said some schools had tried to ban mobile phones.  Some parents felt unhappy because they couldn't get in touch with their children.

    Many teachers said students should not have mobile phones at school, if there was a good reason, they could leave their phones at school office. They also said phones were easily lost and were a distraction for studies.

    Many people say that they understand why parents would want their children to have phones, but they think schools should let students know when they can use their mobile phones.

    When the Apollo astronauts (宇航员) landed on the Moon in 1969, millions of people were rather sad. The person to blame for this was an artist named Chesley Bonestell. For many years, Bonestell had been creating beautifully detailed paintings of the Moon and planets. Viewers of his artwork were unhappy because the real Moon did not look like Bonestell's pictures of it.

    As a space artist, Bonestell tried to make his drawings look exciting and as true as the Moon is. He worked closely with astronomers and scientists to get the most up-to-date scientific information available. But in the 1940s and 1950s, no one had ever seen another planet up close. Yet Bonestell's paintings looked so real that some people thought they were photographs.

    Even though Bonestell was interested in astronomy, he did not start out as a space artist. As a young man he studied architecture — the art and science of designing and making buildings. In 1938 Bonestell became a special effects artist in Hollywood. It was here that he learned he could improve his paintings by following the methods used in the movies.

    In 1944, a popular magazine published a series of Bonestell's paintings of the planet Saturn. He drew Saturn as if it were seen by someone standing on each of the planet's moons. The results were dazzling. Within a few years, Bonestell's artwork was appearing regularly in magazines and books on astronomy and space flight.

    Many of Bonestell's artworks had been right all along. But the biggest surprise was the Moon. Someone asked Bonestell what he was thinking when he saw the first pictures from the Moon. “I thought how wrong I was!” he said. “My mountains were sharp (陡峭的), and they aren't on the Moon.”

    But he shouldn't have felt bad. No space artist had ever before taken so many people to so many faraway worlds. In the years just before the first manned space flights, Bonestell's artwork prepared people for the amazing space adventure to come.

    Have you eaten too much over the holidays? You should try fidgeting for a while. Those around you might not like it, but scratching (moving your nails (指甲) against a part of your body) and twitching (moving suddenly and quickly when you don't want to) is an important way of burning up calories (卡路里).

    American researchers have found that some people's squirming (continuously turn your body when nervous) and wigging (move in small movements, especially from side to side) equals (等于) several miles of slow running each day.

    The scientists, based at the National Institute of Health's laboratory in Phenix, Arizona, are studying why some people get fat and other stay slim.

    In one study 177 people each spent 24 hours in a room in the institute where the amount (量) of energy is measured by their oxygen and carbon dioxide (二氧化碳) levels. By the end of the day, some people had burned up 800 calories in toe-tapping, (moving the front part of your foot up and down) finger-drumming (hitting your fingers continuously and lightly against something hard) and other nervous habits. However, others had burned up only 100 calories.

    The researchers found that slim（苗条的）women fidget more than fat women, but there was no significant difference in men. Heavy people burn up more energy when they fidget than do thin people.

    Whether it's music, art, stage, screen, restaurant and bar deals, or the great outdoors – there's always something interesting going on in Hong Kong

    Tim Yip: Blue – Art, Costumes and Memory

    What: A well-known visual artist, costume designer, and art director for stage and film (particularly on his work for Crouching Tiger, Hidden Dragon, for which he won an Oscar), Tim Yip has been a proud promoter of Eastern aestheticism(唯美主义)for 30 years. For his first large-scale solo exhibition in Hong Kong, Yip explores the nature of human imagination and the depths of the subconscious mind. Organized by Mark Holborn, the exhibition is expected to be praised due to Yip's vision of “New Orientalism”.

    Where: HKDI Gallery, Hong Kong Design Institute, 3 King Ling Road, Tiu Keng Leng, Tseung Kwan O

    When: Until March 31, 2019

    Alice's Adventure at Starlight Garden

    What: Introduced last year, this exhibition became a huge hit, with more than 6,000 photos and videos posted online every day. Created by 27 multimedia digital artists from Korea, the exhibition features a 30-foot rabbit hole for visitors to explore the fantasy world made famous in the book Alice's Adventures in Wonderland. This Christmas, New Town Plaza delivers a brand-new interactive digital version of the literary work. In particular, check out the seventh floor, with its bright lighting, glittering mirrors and rose-shaped decorations.

    Where: New Town Plaza, 18 Sha Tin Centre Street, Sha Tin

    When: Until January 13, 2019

    We Travel in Our Minds

    What: This exhibition of sculpture aims to present ideas of theatricality, the fantastical, travel and exchange, with figures that take the forms of humans and animals. Made by artist Ethan Murrow, a professor at the School of the Museum of Fine Arts at Tufts University in Boston, these dream-like objects are inspired by puppetry (木偶戏), music, trade, navigation and beyond, with mixed effects of materiality, sound and imagination.

    Where: Duddell's, Level 3, Shanghai Tang Mansion, 1 Duddell Street, Central

When: Until March 10, 2019

    Kaitlin Woolley and Ayelet Fishbach report in Psychological Science that a meal taken "family-style" from a central plate can greatly improve the outcome of later negotiations.

    Having conducted previous research in 2017 revealing that eating similar foods led to people feeling emotionally closer to one another, Dr Woolley and Dr Fishbach wondered whether the way in which food was served also had a psychological effect. They theorized that, on the one hand, sharing food with other people might indicate food scarcity（短缺）and increase a feeling of competition. However, they also reasoned that it could instead lead people to become more aware of others' needs and drive cooperative behavior as a result. Curious to find out, they did a series of experiments.

    For the first test they recruited 100 pairs of participants from a local cafe, none of whom knew each other. The participants were seated at a table and fed tortilla chips with salsa. Half the pairs were given their own basket of 20 grams of chips and a bowl of 25 grams of salsa, and half were given 40 grams of chips and 50 grams of salsa to share. As a cover for the experiment, all participants were told this snack was to be consumed before the game began.

    The game asked the participants to negotiate an hourly wage rate during a fictional strike. Each person was randomly assigned to represent the union or management and follow a set of rules.

    The researchers measured cooperation by noting the number of rounds it took to reach an agreement, and found that those who shared food resolved the strike significantly faster（in 8. 7rounds）than those who did not（13.2 rounds）. A similar experiment was conducted with 104

participants and Goldfish crackers（饼干）, this time negotiating an airline's route prices. The results were much the same, with the food-sharers negotiating successfully 63. 3%of the time and those who did not share doing so 42. 9%of the time.

China Mobile, the world's largest telecom carrier by mobile subscribers, has successfully launched the world's first satellite {#blank#}1{#/blank#} (test) 6G architecture, marking a milestone in its efforts to explore integrated space and ground communication technology.

The low-earth orbit test satellite is {#blank#}2{#/blank#} world's first to employ 6G design architecture, and it{#blank#}3{#/blank#} (launch) on Saturday along with another satellite that comes with China Mobile's 5G technology.

The 6G test satellite hosts a distributed autonomous architecture for 6G, {#blank#}4{#/blank#} was jointly developed by China Mobile and the Chinese Academy of Sciences' Innovation Academy for Microsatellites. The system, using domestic software and hardware, supports in-orbit software reconstruction, flexible deployment of core network functions and automated management,{#blank#}5{#/blank#} (enhance) the efficiency and reliability of the in-orbit operation of the satellite core network, China Mobile said.

Set at an orbit {#blank#}6{#/blank#} (high) of approximately 500 kilometers, these {#blank#}7{#/blank#} (experiment) satellites offer advantages such as low latency(延迟) and high data transfer rates {#blank#}8{#/blank#} (compare) with high-orbit satellites which travel at 36,000 kilometers.

Positioned{#blank#}9{#/blank#} a crucial platform for future integrated space and ground networks, low-earth orbit satellites can address telecom signal coverage gaps in land mobile networks, providing higher bandwidth satellite internet services {#blank#}10{#/blank#} (global), according to China Mobile.