【推荐2】Need to take a screenshot (截屏) on your Windows PC?     1    , there are several quick and easy ways to take screenshots in Windows 10, Windows 11, and Windows 8. This article will teach you how to use keyboard shortcuts and the built-in Snipping Tool app to screen capture (捕获) any area of your Windows desktop.

1.     2    . Before you can take a screenshot, make sure that the screen which you want to screenshot is up with no distractions (e.g. open windows or programs).

2. Find the “Print Screen” key on your keyboard. The Print Screen key is most often found in the upper-right side of the main keyboard, and it usually has “SysReq” (“System Requirements”) written below it.     3    .

3. Press the Win key and the Print Screen key at the same time. Doing so will take a screenshot of the current screen; in most cases, you’ll see the screen dim (变暗) briefly. Your screen won’t dim if your computer has certain display settings disabled. This is most common on old computers which you upgraded to Windows 10.     4    , try pressing Ctrl+Win+Print Screen or Fn+Win+Print Screen.

4.Find the screenshot. You’ll find the screenshot inside of the “Screenshots” folder (文件夹), which is inside of your computer’s “Pictures” folder.    5    . For example, the first screenshot you take will be marked “Screenshot(1)”, etc.

【推荐1】Mosquitofish may look small, but these invasive fish are a threat. Outside of their range, they defeat other freshwater creatures, like fishes and tadpoles, and feast on their eggs. Since they have few natural predators (捕食者), their population goes unchecked as they cause damage to native wildlife.

Fortunately, scientists have now invented a new tool meant to intimidate mosquitofish: a robotic fish. “Instead of killing them one by one, we’re presenting an approach that can inform better strategies to control them,” said Giovanni Polverino, a biologist at the University of Western Australia. “We made their worst nightmare become real: a robot that scares the mosquitofish but not the other animals around it.”

The robot, which resembles a largemouth bass, one of the mosquitofish’s natural predators, was equipped with a camera to recognize mosquitofish and tadpoles. The researchers set up 12 tanks with six mosquitofish and six tadpoles in each one and allowed the creatures to adapt for a week before meeting the robot. For one hour twice a week for five weeks, each group was placed in a tank with the robot.

In the robotic fish’s presence, the mosquitofish spent more time getting together, and their swimming became more unstable. With the mosquitofish anxious and scared, the tadpoles ventured out more. These effects even lasted for weeks after the final meet with the robot. When the creatures returned to their tanks, the mosquitofish swam at a lower speed and didn’t eat as much, which are signs of anxiety. No change, on the other hand, can be detected on tadpoles.

What’s more, the mosquitofish spent so much energy living in terror that they lost weight. Males’ body shapes also changed to become more streamlined, likely so they can escape more quickly when they’re scared.

Though the study showed promising results, these robots can’t be released into the water yet. The team still needs to understand the long-term impacts on other wildlife and downstream effects on the ecosystem as a whole. But Polverino says they achieved their main goal: to prove fear can affect the survival of mosquitofish.

【推荐2】Liu Jichen, founder and CEO of Clear Plate®, designed a mini-program that recognizes empty plates and rewards users with points. These points can be exchanged for gifts like books and cellphones, or better yet, they can be used to purchase charity meals donated to poor children in rural areas of China.

In 2016, Liu, a then student of Tsinghua University, noticed a popular campaign called “Leftover Party”, where people brought their leftovers to eat together, intending to raise awareness of food waste. Liu and his classmates organized one such event, which was attended by hundreds of people. The success encouraged him to spread the concept of reducing food waste to a wider audience.

The idea of a mini-program struck him at a dinner in 2017 when Liu dined at a restaurant, which rewarded diners who finished off their food. Liu found that the restaurant would give these diners a card every time and offer them small gifts when they collected a certain number of cards. “Everyone who values food can enjoy a sense of gain at a lower cost,” Liu said, noting that such an idea could be realized online.

He formed a team to work on the project. Yet it was quite a challenge for the AI system to identify the uploaded photos. Liu and his team, assisted by more than 1,000 others, spent half a year collecting over 100,000 samples across the country to train the digital brain.

“There were so many uncertainties in research and development. For our team members, the biggest challenge was whether we were confident enough to complete it,” Liu said. They not only achieved their goal, but now, the mini-program has more than five million registered users. “We hope to inspire everyone to take action against food waste and to contribute Chinese wisdom and solutions to global food security challenges,” he added.

【推荐2】Lessons in the Lost Art of Listening

When was the last time you listened to someone? And when was the last time someone really listened to you? I once asked people what it meant to be a good listener. The typical response was a blank stare.

Of course, technology plays a role. People find phone calls interrupting them, preferring text or wordless emoji. Besides, schools and colleges rarely offer classes or activities that teach careful listening. You can join clubs to perfect your public speaking, but who attempts to achieve excellence in listening? The loud unpleasant mixture of sounds of modern life also stops us from listening.

Generally, listening goes beyond simply hearing what people say. It also involves paying attention to how they say it and what they do while they are saying it, in what context, and how what they say is related to you. It’s not about merely holding your peace while someone else holds forth. Quite the opposite. A lot of listening has to do with how you respond—the degree to which you facilitate the clear expression of another person’s thoughts and, in the process, have a clear mind of your own.

Good listeners ask good questions. They engage in exploring the topic, not to divert attention. There are curious questions like “Wouldn’t you agree…?” or “Don’t you think…?” These questions have strong tendencies. They will greatly influence the other person to change his or her view. And you’d better stay away from some personal questions like “What do you do for a living?” or “What part of town do you live in?” Just try to find out what excites people. Ask about the last movie they saw or for the story behind a piece of jewelry they’re wearing. Also good are expansive questions, such as, “If you could spend a month, where would you go?” Research indicates that when people who don’t know each other well ask each other this type of question, they feel more connected than if they spend time together achieving a task.

Because our brain can think a lot faster than people can talk, be careful with the tendency to take mental side trips when you are listening. Smart people’s attention is easily taken away by their own runaway thoughts. They may also assume they already know what the other person is going to say.

The reward of good listening will certainly be more interesting conversations. Researchers have found that attentive listeners receive more information from speakers, even when they don’t ask any questions. We are, each of us, the sum of what we attend to in life. The gentle voice of a mother and the criticism of a boss both ultimately form and shape us. And to listen poorly, selectively or not at all limits your understanding of the world and prevents you from becoming the best you can be.