1 . On these dark winter evenings, I find myself daydreaming of summer. I think of the one activity and place that quiets my mind: clamming (挖蛤) on Cape Cod.

Before I had kids, it was a much-needed active outing after days of vacation-level eating. But when I went with kids, the experience took a turn from relaxation to devotion. The bay became part of the world I was trying to build for my children. The act of clamming became an unexpected escape,a moment when I wasn't thinking about 20 different things, when I wasn’t really thinking at all.

This year, for the first time, my children joined in the clamming. I kept yelping (尖叫) when my children almost raked (用耙子耙) my feet. But there was joy in having something to teach them, to connect them not only to a generational tradition but also to the history of the land. And when they raised their basket and it wasn’t a rock for the hundredth time, but rather a shining clam, it was a richer moment than if they had struck gold. Seeing a child holding up a clam with an expression of success on his face does more for the heart than any meditation (冥想) ever could.

I hope that one day my children will view clamming as the relaxation that I do. They are not there yet.At this point, it is more adventure than getaway. At the end of our clamming morning, my 6-year-old refused to leave, insisting she needed one more clam. When she finally caught one more clam, she laughed, pride written all over her face. To be fair, perhaps what she needed to get from clamming was not what I needed. Perhaps what she needed was to have a tiny bit of control over this wild world, one in which she has little say. In that moment, she was victorious, if not in calm, then in clam.

2 . For most of us, it's pretty easy to stand up for someone else.     1    . So how do you go from being everyone else' s advocate to learning how to stand up for yourself? These steps come from 16 years of coaching my clients.

·Define your boundaries

The definition of a boundary is a line that marks the limits of an area; it's both a line of containment (keeping you in) and a line of protection (keeping others out). Boundaries are not complaints, threats or demands.     2    . They are your rules for who,what,how and why you feel comfortable being close to someone else, helping others know who you are and how to interact with you.

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The next time someone asks you for a favor, consider if you can afford to say yes. What I mean by this is, think about what this “yes” will cost you in terms of finances, energy, health and time. Do you have an excess of these resources that you can give after you've already cared for yourself?

·Stop people-pleasing

People-pleasing is often motivated by fear. It's easy to fall into the habit because you tend to get praised for it. People-pleasing pleases people. But its effects over a long period of time can be disastrous.     4    

·Ask for what you want

It's not easy to figure out what you want. But the more time you spend getting clear on your own

3 . Scientists are embracing artificial intelligence (AI)-from developing “self-driving” laboratories to replacing human participants in social-science experiments with robots. Many disadvantages of AI systems have been discussed. In an article published in Nature this week, social scientists say that AI systems carry a further risk: that researchers perceive such tools as possessed of superhuman abilities when it comes to objectivity, productivity and understanding complex concepts.

Scientists planning to use AI “must evaluate these risks now”, write co-authors Lisa Messeri and Molly Crockett. The article is a warning about what could be lost if scientists embrace AI systems without thoroughly considering such risks.

Messeri and Crockett examined around 100 papers and books, published mainly over the past five years. From these,they put together a picture of the ways in which scientists see AI systems as enhancing human capabilities.

In one “vision”, which they call AI as Oracle, researchers see AI tools as able to tirelessly read and digest scientific papers. In another vision, called AI as Arbiter, systems are perceived as evaluating scientific findings more objectively than do people. In a third vision, AI as Quant, AI tools seem to perform better than the human mind in analyzing data sets.

Messeri and Crockett also predict risks that arise from these visions. One is the illusion (幻觉) of explanatory depth, in which people relying on another person-or，in this case，an algorithm (算法) — for knowledge are likely to mistake that knowledge for their own. Another risk is that research becomes skewed (偏颇的) towards studying the kinds of things that AI systems can test.

If you’re a scientist planning to use AI, you can reduce these dangers through a number of strategies.All members of the scientific community must view AI use not as unavoidable for any particular task, but rather as a choice with risks and benefits that must be carefully weighed.

4 . A man whose right hand was cut in an operation at the age of 20 is now able to feel the temperature of the objects he touches with his prosthetic (假体的) hand, thanks to a new device integrated in it.

The device, called MiniTouch, was developed last year. It is made by two components, an active thermal (热的) sensor which measures temperature and generates realistic signals which are then sent to the second component, a thermal stimulator (刺激器).

It was first tested as a standalone device at the prosthetic centre of the Italian Institute for Insurance against Accidents at Work (INAIL) near Bologna. INAIL’ s engineers integrated the thermal sensor on the index finger (食指) of the prosthetic hand of one patient, and the thermal stimulator into the connection point that secures the robotic hand to the forearm, in such a way that it touched a point on the remaining arm that aroused thermal feelings in the person’s a prosthetic index finger-the typical feeling of still having the finger.

During eight experimental sessions over six months, the participant could identify objects with three different temperatures or made of different materials. He could also determine whether he was touching a prosthetic arm or a real arm while unable to see, and grasp and move blocks of different temperature in order to classify them from the hottest to the coldest.

“The richness and realism of the feelings provided to wearers is key to the effectiveness of a prosthetic hand in replacing a natural hand in daily activities,” says Emanuele Gruppioni, who led the clinical tests.

“As a next step we will work with a new prosthetic hand, developed in cooperation with the Italian Institute of Technology, to improve the MiniTouch integration and have a light and wearable thermal prosthetic hand,” Gruppioni concludes.

5 . Culinary tourism in New Brunswick has grown dramatically and deliciously in recent years, offering up a variety of new adventures for the foodie explorers. Here’s a sampling of what’s on the menu.

Old-growth Forest Tour

Take a medicine walk with Cecelia Brooks and her son, Anthony Brooks. They guide you through the forest, teaching the history of local medicinal plants and trees along the way. Afterwards, they prepare wild rice and corn pancakes with ingredients straight from Cecelia’s garden.

Kings Landing Tour

Wandering through the open-air museum’s historic buildings and chatting with interpreters dressed in period clothing about life in the Saint John River valley in the 19th century is an immersive cultural experience, but eating history is next level. Tasting a meal in the King Head Inn’s attractive dining room, where traditional pub food evokes (唤起) an immediate journey back in time.

Paddle (划桨) Tour

Second Nature Outdoors offers a sunrise paddle tour on the Saint John River that starts with a canoe (独木舟) out to Hartt Island, where guides teach how to roast coffee over a campfire. Drinking coffee and eating local cheese with river views is the perfect way to begin the day.

Ganong Chocolate Museum Tour

The museum tour includes everything from the early methods of chocolate making to the story behind the Ganong candy dynasty’s famous Pal-o-Mine bar. The highlight must go to the hands-on activity where you participate in the complicated process of hand-dipping chocolates and taste the fruit of your labor!

8 . There is growing evidence to show that our past knowledge about Mars was not always the case. Now European researchers say they have discovered the first evidence of a huge groundwater system that once existed below the planet’s surface.

A new study was carried out by Francesco Salese and his team, who studied images of 24 deep craters (n.弹坑) in the northern half of the Red Planet. These pictures were captured by ESA’s Mars Express orbiter (n.宇宙飞船), which was launched in 2003. The study provides the first geological proof that Mars once had a “planet-wide groundwater system.”

According to Salese, scientific evidence already suggests Mars was once a watery world. His team says the images showed that large amounts of successive groundwater activity connected the areas they studied. Evidence of basins and coastlines was also found on the surface of Mars, supporting the idea that water was once present. He added that all the basins seemed to reach about the same height.

Scientists have yet to find out what happened to all that water. And the complex history of water on Mars has linked to whether or not life ever existed on it. During the latest study, researchers also discovered evidence of minerals within some of the identified (adj.被识别的) bodies of water.

The researchers say the findings adds weight to the idea that the water basins on Mars may have once held the materials required to support life. Some of this material could still be buried on Mars, providing possible evidence of life during future exploration. Francesco Salese believes the latest findings could also help us learn new things about our own planet.

9 . Health, as the old saying goes, is over wealth, so it’s of great significance to keep fit. You can take away our money, our house, or our clothes and we can survive.     1     That is why I eat healthfully, exercise regularly, and keep up my social life.

Eating healthfully is important to maintain one’s health. I try to avoid foods high in fat like French fries or cookies. I also try to limit the amount of animal protein I consume.     2     So, it is important to know how to cook these foods so that the nutrients are not lost in the cooking process.

Our muscles must continue to be strong to support our body as we age. Exercise helps the bones build density and helps us maintain our posture.     3     A regular exercise program of cardiovascular training and weight training is an important part of keeping us healthy.

    4     Studies have shown that people with a wide range of social contacts get fewer colds and recover faster from diseases than those who aren’t socially active. For the sake of health, I like to play and interact with my friends and I always feel better when I am with them than when I am alone.

By eating properly and exercising regularly, I can keep my body at an appropriate weight and can maintain my health. By spending time with my friends, I can keep my mind as well as my body happy.     5