I was very disappointed not to be able to go to the jazz concert last Friday. The advertisement in the paper said that you could buy tickets at the theatre box in Richland Hills any day between 10:00 and 4:00. Since I work from 9:00 to 5:30, the only time I could go to the theatre was during my 45-minute lunch break.

    Unfortunately, the theatre is on theother side of the town, and the bus service between my office and Richland Hills is not very good. Butif you are lucky, you can make the round trip in 45 minutes. Last Monday, Istood at the bus stop for 15 minutes waiting for the bus, By the time I saw onecome around the corner, there was not enough time left to make the trip.

     So I gave up and went back to the office. The same thing happened on Tuesday, and again next day. On Thursday, my luck changed. I got on a bus right away and arrived at the theatre in exactly 20 minutes. When I got there, however, I found along line of people at the box office, I heard one man say he had been waitingin line for over an hour. Realizing I would not have enough timeto wait in line. I caught the next bus and headed back across the town.

    By Friday I realized my only hope was tomake the trip by taxi, it was expensive, but I felt it would be worth it tohear the concert. The trip by taxi only took 10 minutes, but felt like an hour to me. When I got to the theatre, I was relieved to see that nobody was waiting in line. The reason, however, I quickly discovered, was that they had already sold all the tickets.

    Astronomy (天文学) is the oldest science known to man. Thousands of years ago man looked at the stars and wondered about heavens(天堂). But the six planets that he could see with his eyes alone limited man.

    The Greeks studied astronomy over 2,000 years ago. They could see the size, color, and brightness of a star. They could see its place in the sky. They watched the stars move as the seasons changed. But the Greeks had no tools to help themselves study the heavens.

    Each new tool added to the field of astronomy helped man reach out into space. Until there were telescopes(望远镜), man did not know much about the moon. He did not know that the planet called Saturn(土星) had rings around it. His sight was so limited that he could not see all the planets. In the early 1700s, people thought there were only six planets. Pluto (冥王星), the last of the nine planets to be discovered was seen until 1930.

    Before the spectroscopes (分光镜), man didn't know what kind of gas was in the sun or other stars, without radio telescopes(射电望远镜), we did not know that radio noise came from far in space.

    Today, astronomy is a growing science. We have learned more in the past fifty years than in the whole history of astronomy.

    In China we can see more African students in universities, which is a signal of a deeper China-Africa relationship, and the same trend is happening in Africa as well. Most Chinese students choose to study in universities in South Sudan, Egypt, Kenya, Ghana, Ethiopia and South Africa.

    There are three types of Chinese students in Africa. One type is language students who major in local African languages such as Swahili in China and go to African countries to study the language. Another type is non-language students who major in law, economy, culture, education or agriculture and go to African universities for six months to a year to learn more about the culture or for research. The above two types of students are all funded by Chinese government.

    A third type has been growing in recent years. More Chinese choose to develop their career and build a life in African countries, and some of their children tend to receive higher education in African countries. Some Chinese who work in Africa also further their study in their free time. Many Chinese choose to join the MBA program, since they work in a Chinese state-owned enterprise, and an MBA degree could help advance their career.

    In addition, as China and Africa's relations and cooperation are heating up and more Chinese companies and investors come to Africa under The Belt and Road Initiative(一带一路), more talents that understand Africa are needed. Besides, the new generations have more internationalized, curious attitudes, and are more willing to see and experience Africa themselves without any stereotypes(刻板印象), rather than just reading about it in a textbook.

    Overheated property markets in major cities have started to cool down after authorities took measures against speculative buying and a potential home market bubble. However, a long-term effort is needed to make the market stable and sustainable, analysts said.

    Last month, new home prices dropped in seven cities, compared with six in September, according to the National Bureau of Statistics, which monitors housing prices in 70 cities nationwide. In Shenzhen, where housing prices rocketed by more than 30 percent in the past several months, prices declined by 0.5 percent in October.

    “After first-tier cities and some key second-tier cities launched cooling measures, home prices have obviously become stable,”Liu Juanwei, NBS senior statistician, wrote in a note posted on the NBS website.

    Beijing, Tianjin, Shanghai, Xiamen and Zhengzhou began to see home prices switching from rising to dropping in the second half of October, with average prices down by between 0.1 percent and 0.4 percent compared with the first half of the month, he noted.

    Housing authorities in more than 20 cities have launched various measures against speculative buying to curb rapid home price growth, including setting stricter requirements for qualified buyers and limits on buying second and third homes.

    Yan Yuejin, an analyst with property research agency E-House China R&D Institute, said the residential property market is “digesting these policies and measures gradually, and it is likely for the market to have rational and stable prices in the near future.”

    Ma Junwei, an analyst with Deyi Realty in Shanghai, said it will require a long-term effort by regulators and local authorities to battle speculative buying while keeping supplies stable for buyers with solid demand, including those who plan to buy their first home or upgrade their housing.

    In Shanghai, real estate agents said that they have noticed that homebuyers have become more rational. “Buyers are starting to take their time and study their options. They will compare prices, designs and locations and bargain with sales representatives,”said Luo Dingjun, sales manager at Jinyu Property Marketing.“This was not the case two months ago, when they rushed to buy for fear that if they hesitated, prices would grow too fast and they would no longer be able to afford. ”

    Inspired by a 9-year-old cyclist, Lauren Turner, who can only use one hand, a group of University of Guelph students has won an international award for their invention－a bike brake lever (刹车手柄) that pulls both the front brake and the back brake at the same time.

    Lauren Tuner was able to ride her bike, but not as confidently and quickly as her friends.

    “She couldn't use the front brake. She only used the back brake, but the front brake makes you stop twice as fast,” says Micha Wallace, who, with Katie Bell, Anina Sakaguchi and Andrew Morries won second prize in the James Dyson Award for their single-handed bike brake lever.

    "Lauren Turner tried the device (装置) first and she used it all last summer. She had no problems. It helped her go faster because she felt more confident in her braking abilities. She felt safer." says Wallace.

    The invention was the fourth-year design project for the four students. They designed, tested and created a prototype (模型) within a four-month period.

    When Wallace heard about the James Dyson Award on the news, she and her co-inventors entered their project in the U.K.-based contest, which rewards students designers who create products that improve the way we live. The students collected the runner-up prize－£2,000 for them and £500 for their school.

    As well, they had a chance to meet James Dyson, a U.K. famous inventor. Praising the students for their invention, Dyson says the single-handed brake lever could improve safety for all cyclists. By using both brakes at once, you could prevent the possibility of flying over the handlebars and ending up with an injury.

    The students hope to sell it to a major company. It may be used in other devices that require two hands for operation.

    Mention the word superhero, and the images that come to mind are of fictional characters like Spiderman, Wonder Woman, or Batman. However, photographer Josh Rossi has used his camera to show the world's real superheroes — young children who are battling severe diseases and disabilities.

    The event leading to the creative project began in 2016, when Rossi fulfilled his then three­year­old daughter's dream of becoming Wonder Woman. Thanks to the handmade costume and Rossi's impressive Photoshop skills, the photoshoot instantly became a hit.

    Since it was Wonder Woman that brought about the idea, Rossi decided to focus on the superheroes that will appear alongside her in the upcoming movie, Justice League. To make the photo shoot more meaningful to the kids, he matched each child with a superhero with whom they had the most in common.

    The first member of the real­life "Justice League" was Kayden Kinckle. The five­year­old uses prosthetics (假肢) to walk because both his legs had to be cut off due to a born disorder. To Rossi, Kayden's perfect superhero was Cyborg, who was a healthy boy before a terrible accident left him injured, forcing his father to keep him alive with robotic parts.

    Teagan Pettit was born with only half a heart and has already gone through three open­heart surgeries. According to Rossi, the nine­year­old fits the bill for Superman because they both have a weak heart. The fictional superhero grows weak when near Kryptonite (氪), while Teagen's half heart is too weak to control his body temperature. The photographer says, "Superman and Teagan both have hearts of steel!"