【推荐1】Earlier this year I took a trip to England and France to go see some friends. It was a wonderful trip; I really loved it. But one thing that struck me was how different these cultures are from our own. I guess this would strike any traveler because that is the first thing you notice and it is what makes travel so exciting. Of course, these cultures are also similar to ours in many respects, but it’s the differences that really stand out.

One of the things that struck me in particular was the different attitudes towards smoking. As you know, there’s a growing anti-smoking sentiment in Europe. However, when I went to England and France, I got a new perspective on this issue. People seem to smoke anywhere and everywhere, even though anti-smoking signs are all over public places. On the radio, I heard about a member of the World Cup soccer team who smoked. And people were actually saying, “Well, he should not be on the team because he’s a bad example for our children.” I think, if they want to look at bad examples for their children, they should just go out on the street, or go into the subways, or look in the mirror, even, because so many of them are smoking in very inappropriate places. I visited a restaurant buffet in London and saw an English woman scooping up the food with a lit cigarette in her hand. Smoke rising into the air. Actually, when I talked to English people later, they were pretty shocked too, and they said that smoking in a restaurant is rude even by British standards.

This did not give me a bad impression of English people. It gave me, on the contrary, a positive feeling toward American smokers. There are a lot of American smokers who will proclaim their right to smoke whenever they want, but they will follow the rules, generally, because they have consideration for nonsmokers. So this experience in Europe gave me more of a respect for this kind of smoker.

【推荐1】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.”

【推荐3】It’s clear that following a plant-based diet is connected with a lower risk of heart disease. There are many types of plant-based diets, and they are all related to certain foods connected with heart benefits, such as whole grains, fruits, vegetables, nuts and healthy oils. The diets have been most studied for their impact on heart health. These diets are rich in vitamins and minerals that help lower blood pressure, reduce the risk of diabetes (糖尿病) and keep a healthy weight, all of which can lower your risk of heart disease.

Yet, the types of plant foods and their sources are also important. For example, white rice and white bread are plant-based foods, so you would think they’re good to eat. But they are highly processed, and so are depleted of many heart-healthy nutrients (营养) and have enough sugar, which means they can make blood sugar levels rise sharply and increase hunger, leading to overeating. Drinking 100% fruit juice is not the same as eating the whole fruit, since juices can be high in sugar.

Do you really have to cut out all meat for your heart’s health? Which animal foods could have an impact on heart health? Some research has shown that the type and amount matter most. A 2014 study showed that men aged 45 to 79 who ate 75 grams or more per day of processed red meat, like cold cuts, sausage, bacon and hot dogs, had a 28% higher risk of heart failure than those who ate less than 25 grams. However, a study in the January 2017 found that eating 85 grams of unprocessed red meat, three times per week, did not worsen blood pressure.

What is the right plant-based diet for you? “For many men, this may be a matter of bettering their current foods,” says Dr. Satija, a researcher from American College of Cardiology.

【推荐1】Recently, more than 1,000 researchers and executives signed an open letter calling for a pause in research on artificial intelligence. The letter warns that AI may threaten jobs, spread propaganda (宣传), and even lead to the “loss of control of our civilization”.

Many of the signatories (签署者) are thoughtful and experienced AI practitioners. Their concerns should be taken seriously. On balance, though, their approach is likely to evolve into an opposition to progress.

Consider the broader worldview expressed in this document. It said, “Powerful AI systems should be developed only once we are confident that their effects will be positive and risks manageable. ” This is a formula for complete stop, as no one can ever be so confident. The history of innovation is one of trial and error, risk and reward. One reason why the US leads the world in digital technology is that it did not constrain the industry with well-meaning but doubtful regulation. Slowing AI progress, moreover, carries risks all its own. Don’t forget that this technology is likely to make the world richer, healthier, smarter and more productive for decades to come. By 2030, it might be contributing more than $15 trillion to the global economy. Advances in medicine, biology, climate science, education, manufacturing, transportation and much more are on the horizon. Any new rules must be balanced against the vast potential of these efforts.

Nor is AI research advancing into a void (空白领域). The industry already operates within legal parameters (范畴) in response to potential harms. Companies have ensured their products are safe. Trade associations are developing codes of conduct and ethical frameworks. Far from the “out-of-control race”, the AI business is constrained by law and politics and consumer sentiment.

It’s natural to worry about new technologies. But the wealth and abundance of American society is due in no small part to risks taken in the past, in a spirit of openness and optimism. The AI revolution deserves no less.

【推荐3】When Stanford University student Ellen Xu, now 18, was a five-year-old in San Diego, Califormia, she clearly remembers that her parents rushed her little sister to the hospital. Three-year-old Kate had fallen seriously ill; she had a fever, reddened eyes, and some swelling (肿胀) in her hands and tongue.

At first, the puzzled doctors thought she had flu, but when her condition didn’t improve, the Xus returned to the clinic room, where a doctor by chance had a similar earlier experience with such symptoms (症状) in the blood known as Kawasaki disease. Though rare (罕见的), it’s the leading cause of the heart disease in babies and young children, and its causes remain unknown.

The doctor knew how to treat it: He ordered some medicine for Kate, and finally she shook off the illness without suffering damage to her heart.

Xu remembers being curious about her sister’s illness condition and was amazed that the grown-ups couldn’t answer her questions about why it was so hard to check. “In my mind, it was this puzzle I wanted to solve,” she says.

Ten years later, wanting to enter a high school science fair, she had an idea. What if we had a doctor in our pocket? So she created just that: Using AI, Xu designed a program that uses visual facts to check the disease based on five physical symptoms.

The technology works the same way as apps that can identify birds and plants with photos you’ve taken on your cellphone. Worried parents can upload a photo that they have taken of their child, and the technology will scan the picture for symptoms of the disease, which often have a strong visual factors, such as a swollen tongue.

Xu’s invention has been applied as a web app on the website. “The technology could also be developed for recognizing some other diseases,” she says, “It means a lot to me. I want to use AI to help people live happier and healthier lives.”

Xu says that her sister Kate, now in her third year of high school with dreams of becoming an environmental engineer, is strong and healthy.