【推荐1】China’s Tianwen 1 Mars probe (探测器) conducted its fourth orbital correction on Friday evening, as the spacecraft makes ready for its arrival in orbit around Feb. 10, according to the China National Space Administration.

The name comes from the long poem Tianwen, meaning Heavenly Questions or Questions to Heaven, written by Qu Yuan, one of the greatest poets of ancient China. In Tianwen, this name conveys the Chinese nation’s steady effort in pursuing truth and culture of exploring nature and the universe. CNSA also unveiled ( 发 布 ) the logo of China’s planetary exploration missions, featuring the letter C, signifying China, international cooperation and capacity of entering space.

Tianwen I has flown for 197 days and more than 465 million kilometers on its journey to the planet. It is now around 184 million km from Earth and I. 1 million km from Mars. Depending on the two planets’ orbits, Mars is between 55 and 400 million km from Earth. Mars probe Tianwen I is seen in its first selfies in space on Oct. 1, 2020. The administration also published a black-and-white picture of Mars taken by Tianwen I, the first snapshot (抓拍的照片) from the Chinese craft.

Tianwen I, the country’s first independent Mars mission, was launched by a Long March 5 heavy-lift carrier rocket on July 23 from the Wenchang Space Launch Center in Hainan province, kicking off the nation’s planetary exploration program.

A successful landing would make China only the second nation to place a spacecraft on the Martian planet. China would also be the first to successfully orbit, land and deploy ( 部署) a vehicle in the same mission. According to experts, searching for signs of life on Mars will be the first and foremost scientific goal. China is open and inclusive in the development of its space technology not least because it believes that the exploration of outer space should help build a community with a shared future for mankind.

【推荐2】The world’s first fully electric plane has flown successfully for almost 15 minutes. The world’s first fully electric commercial aircraft took its first test flight on Tuesday, taking off from the Canadian city of Vancouver and offering hope that airlines may one day end their polluting emissions.

“This proves that commercial airmail in all-electric form can work,” said Roei Ganzarski, CEO of Seattle-based engineering firm MagniX. The company designed the plane’s motor and worked in partnership with Harbour Air, which carries half a million passengers a year between Vancouver, Whistler ski resort and nearby islands and coastal communities. Ganzarski said the technology would mean significant cost savings for airlines—not to mention zero emissions. “This signifies the start of the electric airmail age,” he told reporters.

Civil airmail is one of the fastest growing sources of carbon emissions as people increasingly take to the skies and new technologies have been slow to make remarkable progress. At 285 grammes of CO₂ emitted per kilometre (mile) travelled by each passenger, airline industry emissions far exceed those from all other transport, according to the European Environment Agency.

The e-plane—a 62-year-old, six-passenger DHC –2 de Havilland Beaver seaplane improved on with an electric motor—was piloted by Greg McDougall, founder and CEO of Harbour Air. “For me that flight was just like flying a Beaver, but it was a Beaver on electric steroids (电动兴奋剂). I actually had to turn off the power button,” he said. McDougall took the plane in a short circle along the Fraser River near Vancouver International Airport in front of around 100 onlookers soon after sunrise.

【推荐3】Rapid progress in artificial intelligence, also called AI, and the wide use of robots across different industries are causing the worry about the growth in joblessness. People have different opinions on this development, and they mainly have focused on what to do to make sure that robots don't steal jobs.

Bill Cates, for example, have called for taxing(对…征税)robots that take away jobs. This has led to disagreement from other leading figures, such as Larry Summers, who thinks that robots are job creators and that it is totally wrong. Another idea is to use a basic income for all-the ides that everyone receives the lowest income-to pay for influence of technological unemployment. This idea also causes disagreement.

However, jobs are not created or lost because of a single technology, but because of the business system designed to make use of the power of the technology.

We have seen a similar example in history, with recorded music in the last century. It wasn't the 1930s recording technology itself that affected the jobs of the live musicians. It was its connection with radio broadcasting，jukeboxes(自动唱机)and the way businesses operated that led to the job losses. Hotels, restaurants and bars replaced live musicians with jukeboxes. A single recording could be placed over and over without requiring the appearance of the musicians.

The early recording of music destroyed the jobs of some live musicians and made them earn less money than before. The social dissatisfaction was largely about monopoly power(垄断势力)and less about the technology itself.

Job creation or loss has to be considered with everything considered. This is the best explained by looking at the difference between recorded music in the last century and robots now.

【推荐1】At the start of the 20th century, an American engineer named John Elfreth Watkins made predictions about life today. His predictions about slowing population growth, mobile phones and increasing height were close to the mark. But he was wrong in one prediction: that everybody would walk 10 miles a day.

Today, in Australia, most children on average fall 2, 000 steps short of the physical activity they need to avoid being overweight. In the early 1970s, 40 per cent of children walked to school, while in 2010, it was as low as 15 per cent.

The decline is not because we have all become lazy. Families are pressed for time, many with both parents working to pay for their house, often working hours not of their choosing, living in car-dependent neighborhoods with limited public transport.

The other side of the coin is equally a deprivation: for health and well-being, as well as lost opportunities for children to get to know their local surroundings. And for parents there are lost opportunities to walk and talk with their young scholar about their day.

Most parents will have eagerly asked their child about their day, only to meet with a “good”, quickly followed by "I'm hungry". This is also my experience as a mother. But somewhere over the daily walk more about my son's day comes out. I hear him making sense of friendship and its limits. This is the unexpected and rare parental opportunity to hear more.

Many primary schools support walking school-bus routes, with days of regular,   parent-accompanied walks. Doing just one of these a few times a week is better than nothing. It can be tough to begin and takes a little planning---running shoes by the front door, lunches made the night before, umbrellas on rainy days and hats on hot ones-but it's certainly worth trying.

【推荐2】Running is often tiring and a lot of hard work, but nothing beats the feeling you get after finishing a long workout around the track.

But while it’s long been believed that endorphins (内啡肽) —chemicals in the body that cause happiness—are behind the so-called “runner’s high”, a study suggested that there may be more to this phenomenon than we previously knew.

According to a recent study published by a group of scientists from several German universities, a group of chemicals called endocannabinoids (内源性大麻素) may actually be responsible for this familiar great feeling.

To test this theory, the scientists turned to mice. Both mice and humans release high levels of endorphins and endocannabinoids after exercise. After exercising on running wheels, the mice seemed happy and relaxed and displayed no signs of anxiety. But after being given a drug to block their endorphins, the mice’s behavior didn’t seem to change. However, when their endocannabinoids were blocked with a different drug, their runners’ high symptoms seemed to fade.

“The long-held notion of endorphins being responsible for the runner’s high is false. Endorphins are effective pain relievers, but only when it comes to the pain in your body and muscles you feel after working out,” Patrick Lucas Austin wrote on science blog Lifchacker.

Similar studies are yet to be carried out on humans, but it’s already known that exercise is a highly effective way to get rid of stress or anxiety. The UK’s National Health Service even prescribes (开药 方) exercise to patients who are suffering from depression. “Being depressed can leave you feeling low in energy, which might put you off being more active. Regular exercise can improve your mood if you have depression, and its especially useful for people with mild to moderate (中等的) depression,” it wrote on its website.

It seems like nothing can beat that feeling we get after a good workout, even if we don’t fully understand where it comes from. At least if we’re feeling down, we know that all we have to do is to put on our running shoes.

【推荐3】People speak English in different parts of the world. The same words can be used in different ways, depending on where you live. People can also have completely different ways of saying the same thing.

The Oxford English Dictionary(OED) is asking the public to help it add new words. Editors want to find the regional differences in English around the world. They want to expand its record of the language.

Last year, the OED, BBC Radio and the Forward Arts Foundation teamed up to find local words in the United Kingdom. It resulted in more than 100 regional words and phrases being added to the dictionary. One was “cuddy wifter”, which means a left-handed person.

Now, the OED is widening its search to English speakers around the world. Eleanor Maier, an editor at OED, said the response has been great. Editors are listing a bunch of suggestions to include in the dictionary.

These include Hawaii’s “hammajang”, which means “in a disorderly state”. Another is the word for a swimming costume, “dookers” or “duckers”. It is used in Scotland.

The OED also might include the word “frog-drowner”, which Americans might use to describe a downpour of rain. Another possibility is “brick”. It means “very cold” to people in New Jersey and New York City.

The dictionary has already found that, depending on location, a picture hanging off center might be described as “agley”. It might also be called “catawampous” or “ahoo”.

“The OED aims to cover all types of English,” Maier said. That includes scientific words, slang and regional language. Maier also said that it can be difficult for the OED’s editors to identify regional words. The terms are more often spoken than written down.

The appeal is called Words Where You Are. It is looking for more suggestions. “We were surprised and pleased by the number of regional words we were able to include,” said Maier.