Being seen in a fancy sports car or enjoying a beach holiday in a five-star hotel were once signs of having ''made it”.

    But a new study suggested that having people think of you as constantly busy and overworked is now a far better way to show social status(地位).

    According to Harvard University in the US, people are increasingly leaning toward the phenomenon of “humble-bragging (谦虚自夸)”. This is when people make a seemingly modest statement that actually draws attention to something they want to brag (吹嘘) about.

    Phrases such as “I have no life” and “I desperately need a holiday” are now used to imply social standing, while ordering food and shopping online is the perfect way to prove to neighbors that you are simply too busy and important to go to the supermarket.

    “Movies, magazines, and popular TV shows often highlight the abundance (富足) of money and leisure time among the wealthy,” said Neeru Paharia, an assistant professor at Harvard University.

    “In recent years, featuring wealthy people relaxing by the pool or on a yacht (游艇), playing tennis or skiing and hunting are being replaced with advertisements featuring busy individuals who work long hours and have very limited leisure time,” he said. “Displaying (how busy you are at work) and a lack of leisure time operates as a visible signal of status in the eyes of others.”

    The researchers pointed out that the Wall Street Journal's 2016 advert campaign featured celebrities complaining about their busy lives, with the slogan (标语). “People who don't have time, make time to read the Wall Street Journal.”

    The report, which was published in the Journal of Consumer Research, also found that brands that marketed themselves as timesaving were becoming increasingly high-status, because of the people who used them.

    According to the authors, this trend of humble-bragging is due to people's shit of focus-they now value “the preciousness and scarcity (稀缺) of individuals" more than “the preciousness and scarcity of goods”.

    “Busy individuals possess desirable characteristics, leading them to be viewed as scarce and in demand,” the authors concluded.

    When I was a little child, my parents divorced, making my mother a single parent. We had little money, but my mom gave me a lot of love. Each night, she sat me on her lap and spoke the words that would change my life, "Kemmons, you are certain to be a great man and you can do anything in life if you work hard enough to get it."

    At fourteen, I was hit by a car and the doctors said I would never walk again. Every day, my mother spoke to me in her gentle, loving voice, telling me that no matter what those doctors said, I could walk again if I wanted to do it badly enough. She drove that message so deep into my heart that I finally believed her. A year later, I returned to school—walking on my own!

    When the Great Depression（大萧条）occurred, my mom lost her job. Then I left school to support the family. At that moment, I was determined never to be poor again.

    My real change occurred on a vacation I took with my wife and five kids in 1951. I was angry that the second-class hotel charged an extra $2 for each child. That was too expensive for the average American family. I decided to open a motel（汽车旅馆）for families that would never charge extra for children. There were plenty of doubters at that time.

    Not surprisingly, mother was one of my strongest supporters. We experienced a lot of challenges. But with my mother's words deeply rooted in my soul, I never doubted we would succeed. Fifteen years later, we had the largest hotel system in the world—Holiday Inn. In 1979 my company had 1,759 inns in more than fifty countries with an income of $ 1 billion a year.

    You may not have started out life in the best situation. But if you can find a task in life worth working for and believe in yourself, nothing can stop you.

    Dr Dian Fossey, one of the world's leading women scientists, had a remarkable career. The work she devoted her life to protecting and studying the mountain gorillas (大猩猩) of Africa—has proved highly effective and has resulted in the steady (平稳的) increase of this most endangered great apes.

    Fossey made her first trip to Africa in 1963. Three years later, she returned to Africa to begin a long term study of the mountain gorillas. She set up camp in the Democratic Republic of Congo but moved to Rwanda because of political reasons in 1967. She established her "Karisoke" Research Centre camp on September 24, 1967.

    Fossey's aims were to study gorilla ecology (生态学) and social organization. She found that in order to achieve this, she needed to recognize individual gorillas, which required that the gorillas get used to her presence (出现). By copying gorillas' behaviour and sounds, Fossey began to gain their trust, and in 1970 an adult male gorilla she had named "Peanuts" reached out to touch her hand.

    Close observations over thousands of hours enabled Fossey to gain the gorillas' trust and bring forth new knowledge about their behaviour. Stories and photographs of her work were published in National Geographic Magazine and elsewhere.

    In 1977, one of Fossey's favorite gorillas, Digit, was killed by poachers and she established the Digit Fund to help raise money for gorilla protection efforts in the same year.

    On December 26, 1985, Fossey was murdered while going back to her house in Karisoke. Her body was discovered near the research centre. Most probably? Dian Fossey had been killed by the poachers she'd fought against. On her tombstone (墓碑): "No one loved gorillas more..."

    In 1988, the life and the work of Fossey were made into a movie based on her book.

Biofuels (生物燃料), gained from plants and animal matter, are a key solution to the environmental problems caused by fuels like coal. "Bioalcohol (生物酒精) is the most common biofuel and is produced by sugars found in materials such as corn. With some engine redesigned, it can be used directly by cars, buses, etc. ," says Professor Daniel Tan, "12 percent of transport fuel could come from biofuels, especially bioalcohol, by 2030. "

But a 2016 study of biofuels said, "Bioalcohol presently is mostly produced with food crops. Altogether, the environmentally-friendly biofuels rely on about 2-3 percent of the global water and land used for agriculture, which could feed a large number of hungry people. "

Energy experts have therefore been trying to deal with the problem. Recent research led by an international team found that the agave (龙舌兰) plant might offer a way out. This plant tends to be the right bioalcohol source to supersede others such as sugarcane (甘蔗) and corn.

Daniel Tan explains that the agave can be grown in unfavorable conditions and is not a major food crop. "It can grow in areas that lack water and rainfall without being watered by farmers, and it does not compete with food crops or put demands on limited water. This kind of useful plant is recently being grown in Australia. It can survive Australia's hot summers," he says.

The study finds that sugarcane produces just a little more fuel per square meter each year than the agave. However, the agave outperforms sugarcane in a range of areas, including pollution to the earth, and water using. The agave uses 69 percent less water than sugarcane and 46 percent less water than corn for the same amount of fuel produced. As for corn，it produces less fuel per square meter each year than the agave.

However, Daniel Tan states: "The first generation of bioalcohol from the agave recently faces a big competition from oil, whose recent low price makes it far more attractive to customers. Without some policy support from the government, bioalcohol production from the agave faces big challenges. "

Vitamin D was recognized a century ago as the cure for rickets, a childhood disease that causes weak bones. Then, in the early 2000s, a pile of studies suggested that low vitamin D levels could be a factor in cancer, cardiovascular（心血管） disease, Parkinson's disease and so on. This simple vitamin seemed to be a cure for whatever troubled us. However, all these observational studies have a fundamental weakness: they can identify a co-occurrence between vitamin D and a disease, but they can't prove there is a cause-and-effect relation.

To look at whether taking vitamin D had curative effects, Manson and her team started the world's largest and most far-reaching randomized vitamin D trial. The study followed nearly 26,000 healthy adults, randomized to receive either 2,000 international units （IU） of vitamin D or a placebo（安慰剂）, for an average of 5.3 years. The volunteers were almost evenly split between men and women, and 20 percent of the participants were black.

The results came as a shock. Not only did vitamin D not reduce rates of cancer or heart disease, but the trial also found that vitamin D did not prevent or improve cognitive function, or reduce the risk of bone fractures（骨折）. The finding about fractures "was a real surprise to many people," Manson says.

In 2011, the Institute of Medicine established an expert committee to conduct a thorough analysis of all existing studies on vitamin D and health. The committee concluded that the bone-strengthening benefits of vitamin D remain steady when blood levels reach 12 to 16 nanograms per millililter. They also found that there were no benefits to having levels above 20ng/ml. According to measurements of vitamin D levels in the general U. S. population, most had levels of 20 ng/ml or more in 2011. Levels have actually risen since then, meaning that most people don't need to take extra vitamin D.

The ups and downs of vitamin D offer a lesson in humility. The relation between the vitamin and disease is far more complicated than it first seemed and a reminder that scientific understanding is always developing over time.

A visually-challenged man from Beijing recently hiked (徒步) 40 days to Xi'an, as a first step {#blank#}1{#/blank#} (journey) the Belt and Road route (路线) by foot. 

On the 1,100 kilometer journey, the man Cao Shengkang, {#blank#}2{#/blank#} lost his eyesight at the age of eight in a car accident, crossed 40 cities and counties in three province. Inspired by the Belt and Road Forum for International Cooperation {#blank#}3{#/blank#} (hold) in Beijing, Cao decided to cover the route by hiking as a tribute (致敬) to the ancient Silk Road. {#blank#}4{#/blank#} friend of his, Wu Fan, volunteered to be his companion during the trip. 

Cao and Wu also collected garbage along the road, in order to promote environmental {#blank#}5{#/blank#} (protect). Cao believes this will make the hiking trip even more {#blank#}6{#/blank#} (meaning). The two of them collected more than 1,000 plastic bottles along the 40-day journey. 

In the last five years. Cao {#blank#}7{#/blank#} (walk) through 34 countries in six continents, and in 2016, he reached the top of Kilimanjaro, Africa's {#blank#}8{#/blank#} (high) mountain. 

Now, Cao has started the second part of his dream to walk along the Belt and Road route. He flew 4, 700 kilometers {#blank#}9{#/blank#} Xi'an to Kashgar on Sept. 20, {#blank#}10{#/blank#} (plan) to hike back to Xi'an in five months.