2 . Have you ever imagined an insect-inspired robot, which weighs less than a gram, could one day help out in surgery (外科手术)?

Scientists have designed this small, “insect-bot” called mCLARI that can control and even change its body shape as it travels in different environments to fit through gaps. It’s 2 centimeters long, weighs less than 0.97 grams and can travel at a speed of 6 centimeters per second.It’s the smaller, faster replacement to CLARI, which was designed by the same team.

“Because of the robot’s small size and ability to change shape, we expect usage of this technology in four important areas,” the lead author Kaushik Jayaram said. These include disaster (灾害) response , check on high-value objects, environmental monitoring and medical treatment.

“In the long term, we hope such robots will be used more widely in moving through human bodies and performing surgeries that can’t be easily done at present,” Jayaram said. With mCLARI, Jayaram’s team is moving closer to creating robots that can fit in different environments—just like the insects they’re inspired by.

The mCLARI robot has four legs and can move in narrow spaces by changing between running forward and side-to-side and can use different speeds in human bodies. Its legs are joined to its body through joints (关节), which enables mCLARI to change its body shape based on the environment it is in. For example, its legs can be lengthened up to 50% in certain spaces.

As follow-up work, the scientists want to give mCLARI more power and sensing ability while helping the surgeries. “We are also excited about understanding the effect of shape change on improving functions of robots,” Jayaram said. “And this is sure a great one-step forward of the technology. The robot will have entered the market by 2025 and will bring greater benefits to mankind, especially in medical treatment.”

3 . Mental health is a critical aspect of overall well-being, yet it is often ignored in our fast- paced society.     1     A well-cared and healthy mind leads to improved emotions, better relationships, and a more positive outlook on life.

    2     When we are stressed or upset, it is our mind’s way of reacting to negative stimuli(刺激). Good mental health allows us to cope with these emotions in a positive manner. In addition, when our minds are not clouded by negative thoughts or emotions it is easier to think clearly.     3    

Studies have shown that a person with good mental health lives longer and has a higher quality of life. The effects of positive mental health on the body are plenty, including reducing the risk of diseases and improving overall physical well-being.

Our mental state has a significant impact on relationships. People with good mental health are more likely to be kind and understanding.     4     This may further guarantee them with a stable emotional condition.

Mental health is as essential as physical health in maintaining a fulfilling life. If we run into trouble, don’t keep it to yourself.     5     With the right support, we can all enjoy the benefits of a healthy mind.

4 . Thousands of books are published daily, and book advertisements play a crucial role in increasing awareness about those books. But it’s too easy to be tricked into bad “advertising opportunities” and make the wrong decisions. Here are several forms of digital advertising proven to work well.

Facebook advertising: Facebook provides the perfect advertising platform for authors because it allows targeting very specific categories of people. The other advantage is that it’s easy to test. You can start with a budget as low as $5 and gradually increase your monetary (货币的) commitment if your return on investment is positive.

Amazon advertising: Amazon allows you to show ads about your book directly on other book pages and search result pages. Since their main US rollout in 2017, they’ve become the most effective advertising place for authors.

Bookbub advertising: Bookbub rolled out a self-serve ad platform in 2016, which they’ve greatly improved since. It’s a less competitive playing field than Facebook or Amazon, but it does have its features.

Discount/promotion advertising: If you’re running a discount or free promotion on one of your books, you can apply to have it advertised in the newsletters of platforms such as Freebooksy, Bargainbooksy, etc.

Other types of advertising include search advertising, Goodreads advertising, banner ads on websites, etc. These haven’t produced the same effective results for most authors yet, but they could be just as effective (or more) if you write in a certain field.

5 . A new study, led by Dr. Rebecca Stone, has shown that children as young as four years old eat 79% more calories when they are bored, compared to when they are in a normal mood (情绪) .

The researchers have explored the behaviors that make children more likely to eat when they experience negative emotions. Often when children experience bad emotions such as boredom or sadness, caring adults will use food to soothe them. However, this behavior, known as emotional feeding, appears to increase the possibility of children eating more when they are in low spirits. As time passes, too many calories intake will have a significant effect on children’s health both mentally and physically.

Dr. Stone stresses that the experience of boredom is important in the development of children’s sense of self and creativity, so she does not recommend that children should avoid being bored. Instead, she suggests children learn to experience boredom without turning to food. She also suggests that parents turn their children’s attention away from food when they feel bored, or restructure the home food environment to make it less likely that children turn to food in response to being bored.

While there do appear to be individual differences between children in terms of their eating when bored, it is helpful to know that the feeding practices that adults use around food might shape the likelihood of this happening. Although it is attractive to use food as a tool to help children, emotional feeding might lead to greater emotional eating in the future. It is important for parents and caregivers to be aware that this short-term fix could create future problems.

It is hoped that, on the original basis of the study, the team will deeply explore other negative mood states in children and offer advice and support for families to find more effective ways to manage challenges around children eating behavior.

7 . Books are the most valuable cultural heritage. However, there are many ancient Chinese classics suffering from different degrees of damage due to various reasons.     1    

Bai Yuzhi,a post-90s restorer (修复师) at the Wuhan Library,graduated from Wuhan University in 2016 with a major in restoring ancient books. She is now the fourth generation of restorers at the Wuhan Library, Bai started practicing this technique during her after-class activities at college in 2014.     2     “I’m shy and not good at socializing, so this job suits me very well,” she said

    3     The restoration steps cannot be rushed. When restorers receive an ancient book, their first task is not to directly restore it but to observe it and record the book’s important details. After that, the restorers will open the book,remove every page, and repair it on the back side.     4     It may take one or two days to restore a single page. So it could take at least a month to complete the restoration of a whole book.

Bai has restored about 10,000 pages of ancient books in her over 10 years of work. The most difficult part of the restoration, according to her, is keeping everything under exact control over every stage.     5     If the paste (面糊) is too thin, the repaired pages may easily come off and become broken, which could affect the quality of the restoration. However, if the paste is too thick, the fixed pages will be tough, challenging to open.

With the advancement of science and digital technology, the methods for protecting ancient books have become more various.

8 . While screen time is known to affect sleep, new research suggests that interactive (互动的) activities, such as texting friends or playing video games, put off and reduce the time spent asleep to a greater degree than passive (被动的) screen time like watching television, especially for teens.

The team studied the daytime screen-based activities of 475 teenagers using daily surveys. They asked the teens how many hours they had spent that day communicating with friends through social media and how many hours they spent playing video games, surfing the internet and watching television or videos. Finally, the researchers asked if they had joined in any of these activities in the hour before bed.

Next, the team measured their sleep time for one week. The researchers found that the teens spent an average of two hours per day communicating with friends via social media, about 1.3 hours playing video games, less than an hour surfing the internet and about 1.7 hours watching television or videos. For every hour throughout the day that they used screens to communicate with friends, they fell asleep about 11 minutes later averagely. For every hour to play video games, they fell asleep about 9 minutes later. Those who talked, texted or played games in the hour before bed lost the most sleep: about 30 minutes later.

Interestingly, David, lead author of the study, said the team found no obvious relations between passive screen-based activities and sleep. “It could be that passive activities are less mentally exciting than interactive activities,” said Anne, co-author of the study. “It’s a tricky situation,” she said. “These screen tools are really important to everyone nowadays, so it’s hard to put a limit on them, but if you’re really looking out for a teenager’s health and well-being, you might consider limiting the more interactive activities, especially in the hour before bed.”

10 . Culture shock is the experience that often accompanies moving to an unfamiliar place. It could be marked by feeling lost, anxious or hesitant.     1     You’ll become accustomed to the same things that initially “shocked” you! Read on for tips for overcoming culture shock in a short time.

When deciding to visit an entirely new place, don’t expect the traditions and cultures followed by your current home to be followed by the new land.     2     So keep your expectations low.

Even though it is an unfamiliar environment hosting different cultures and traditions from the one you’re used to, it’s vital to broaden your mind and be willing to try new things. Don’t be quick to form discriminatory judgments just because it is “odd”. Have a go at something different, like a food or clothing — different isn’t necessarily bad.     3    

Social psychologists claim that lack of information is the biggest contributor to prejudices. Talk to the local population and ask them about how their culture works instead of assuming the worst.     4     Plus, you’ll make some friends who can ease your transformation.

Keep yourself open-minded, await new experiences and familiarize yourself with the conduct of the people.     5     Go out there and have fun!