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At Mnazi Mmoja Hospital in Tanzania, 53-year-old Dr. Baiya Abdullah Rashid successfully performed his first Laparoscopic Cholecystectomy (胆囊切除术), (guide) by his Chinese mentor (导师). After 10 months of training in minimally invasive (开刀的) surgery, he became the second local doctor in Zanzibar capable of performing this procedure independently. He expressed gratitude to his mentor and the doctors from 18 Chinese medical teams have trained him, acknowledging their efforts (improve) healthcare for the local community.

China (send) 27 medical teams to Tanzania since 1964, treating nearly 20 million people and filling many technical gaps in local hospitals. Despite (difficulty) like limited equipment, sources, and complex disease types, the Chinese medical team continues to develop (effect) treatment plans to carry out operations (smooth).

Highly respected by locals, Chinese doctors (call) "Doctor Rukia", which is "beautiful and kind-hearted doctor" in the local language. The local people are not wealthy, they still find ways to show their gratitude to the Chinese medical team, such as offering carefully handmade gifts.

Nassor Ahmed Mazrui, Zanzibar's Minister of Health, praised the Chinese medical team "true angels in white" who play a key role in Zanzibar. The people of Zanzibar will continue to benefit from this valuable partnership for years to come, as both communities work together towards a healthier future.

That was when I decided to3 the joy. I started joking with my patients and found that they4 faster as laughter kept them positive. One day, an idea flashed through my mind: If laughter is so powerful, why not start a Laughter Club? I went to a park and tried to explain the5 of laughter to the morning walkers. They thought I was6. But I remained determined. Out of 400 passersby, I7 four to join me. That small group marked the8 of my club.

We met for half an hour every morning to9 together. At first, we started with telling a joke. But some people were naturally10. My new challenge was getting these emotionally held-back people to laugh without reason. I introduced11 exercises like clapping and shouting "Ho Ho Ha Ha Ha", which helped everyone12 and prepared them for the following activities.

Soon, I developed more laughter exercises, including role-playing and techniques I had13 when I was an amateur actor.14, the laughter grew louder and its reach grew farther. From that initial group of four, the club began to15, proving that laughter is truly the best medicine.

One of Bird Buddy's best features is its camera. It has a built-in camera that captures (捕捉) real-time photos and videos. Connected to Wi-Fi, it sends media of each visiting bird directly to your phone. Whether it's a lively sparrow or a shy finch, you get a clear, close look with every visit. With this view, bird watching becomes an effortless and thrilling experience.

It uses AI to identify over 1,000 bird species. It sends you a notification (通知) when a bird arrives. There's even a "Name That Bird" feature that lets you name and follow individual birds over time. This function helps you build connection with your backyard guests. Each identified bird is saved into a digital collection. Thus, a visual diary of visits is built. It turns simple watching into a rewarding hobby.

But Bird Buddy does more than bring joy. It builds eco-awareness. According to Audubon's Survival by degrees report, two-thirds of North American bird species face threats from climate change. By watching and identifying birds, users grow more aware of local wildlife and environmental shifts.

What's more, Bird Buddy directly aids scientific research and conservation. Researchers can use this information to track migrations, monitor population health, and study climate impacts. Bird Buddy shows how technology can bring us closer to nature—and help keep it safe for the future.

A. Bird Buddy includes smart bird recognition.

B. This can lead to stronger support for conservation.

C. It collects data from millions of bird visits each day.

D. It's like having a front-row seat to nature's wonders.

E. It invites researchers to share their knowledge about birds.

F. Bird Buddy's AI system provides live comments on bird behavior.

G. Birdwatching is a popular activity for over 96 million people in America.

Hailong Fan and his colleagues started by creating 180 different types of hydrogel. This was made possible by their prior analysis of 24, 000 protein sequences (序列) to identify the stickiest combinations. The key material properties of these hydrogels were then fed into artificial intelligence (AI) models. With the models trained, they could predict even better recipes for super-sticky materials. This process let the team develop a new class of sticky hydrogel.

To test its practical performance, researchers used one of these hydrogels to cover a hole in a three-meter-long pipe filled with water, to recreate a situation where water was flowing out under high pressure. As soon as the hydrogel was in place, the water stopped flowing, and the material continued to block the hole for more than five months, even when it had been unstuck and restuck multiple times.

The new hydrogel shows great promise, though it still faces challenges. It must be relatively thick to work effectively and requires further testing on rough, chemically complex, or moving surfaces. These challenges, however, do not overshadow their potential, and the researchpaves the way for future advances. The team is now working on customizing the hydrogel for wound dressing, marine equipment and emergency repairs.

As materials scientist Ting Xu pointed out, the power of this AI-driven strategy lies in a simple principle: "AI can provide the answers, but humans must ask the right questions." Not limited to hydrogels, the strategy can be extended to other soft materials and might one day be automated using laboratory robotics — an approach that could significantly shorten the path from idea to functional material across countless applications.

This phenomenon is known as social facilitation (促进), which describes how individuals can perform tasks differently when in the company of others compared to when they are alone. The concept was first proposed by psychologist Norman Tripplett, who noticed that cyclists raced faster in groups. He tested his theory with a simple experiment where children were tasked with winding fishing line. Tripplett observed that the children who were being around others moved faster, suggesting that a peer (同龄人) nearby can motivate.

But later studies found conflicting evidence. In another test, participants were given a more complex task, like memorizing a list of words. Those in front of others performed worse than those working alone. This contradiction (矛盾) led to a key change of the theory. The presence of an audience tends to improve performance on simple tasks. On the other hand, for novel tasks, the same audience can hurt performance.

Why does this happen? Psychologists suggest the key reason is our concern about being judged by others. Since approval and disapproval often depend on others' evaluations, we naturally become more alert in front of an audience. This alertness helps with mastered skills, but gets in the way of learning new ones.

There isn't one recipe for success, but social facilitation theory helps to point us in the right direction. To improve a well-practiced skill like running or playing an instrument, strategically seek an audience by joining a club or performing publicly. If you struggle when watched, practice alone until you gain confidence. By taking advantage of social settings wisely, we can use the audience effect to achieve our best performance.