As I prepared for my Level 8 Royal Conservatory of Music piano exam, memories of previous disappointing marks filled me with dread and anxiety. The mere thought of booking the exam made me feel completely strained. However, fate had other plans in store for me.

Just when I thought things couldn't get any worse, my trusty 10﹣year﹣old electric piano malfunctioned. The middle C note played as an F﹣sharp, and multiple other keys were out of tune.

Despite my distress, my father refused to buy a new piano and instead urged me to be more resourceful. Initially, I was at a loss without my beloved electric piano. But after struggling for a few days, I was determined to find every available piano room on campus. After discovering hidden pianos in corners, I spent countless hours practicing. As my exam drew near

One day, while practicing in a piano room, one of my teachers walked in and offered me a mini exam. To my surprise, I found a place where I could be anyone.

Playing the piano became my escape from the anxieties of adolescence and allowed me to express myself freely. When it was time to play in front of the examiner, I no longer feared judgment. Instead, I only feared not being able to represent all my hard work. As the lights came on

Eventually, I received my mark. Not only did I achieve a rarely given "well done", but I also discovered a newfound appreciation for music. Whenever I feel discouraged, some lessons are best learned the hard way.

Omar Vazquez grew up in poverty on Mexico's Yucatan peninsula. He watched his single mother struggle to put food on the table, and today the memory inspires him to help those in need. When an invasive (入侵的) seaweed called sargassum showed up on Mexico's Caribbean beaches, Omar looked past the matter of it all and saw an opportunity to help others.

Sargassum is not dangerous, but it has an unpleasant smell and can become so thick that it keeps people from entering the water. Mexico has experienced record-setting amounts of the seaweed in recent years, and it has made its way to Florida's beaches as well. Experts say there could be as much as 100 tons of sargassum blocking Mexican shorelines in 2023.

With tourism dollars at risk, officials and locals alike were eager to remove the seaweed, but only Omar saw its true potential. The professional gardener organized a beach cleanup that provided jobs for about 300 local families, but he knew there was more to do. Since people's attitude towards the seaweed reminded him of his own life experiences, he decided to become an agent (推动者) for change.

When sargassum started arriving, everyone was complaining. "I wanted to make something good out of something everyone saw as bad," Omar explained.

In 2018, Omar found a way to turn sargassum into building blocks that he calls Sargablock. He creates these blocks by mixing 40% sargassum with other materials like clay, then putting them in a block-forming machine and baking them in the sun for days. The end result is an organic, sustainable, and ecologically friendly building material that experts say could last for 120 years.

To date, Omar's company, Bluegreen Mexico, has used 700 tons of sargassum to build low-income housing for those in need. Omar said he would take on more projects, and donate more houses to single mothers like his own mom.

In February of 2005, Phil Belfiore was teaching one of Robert Frost's poems Stopping by Woods on a Snowy Evening. He liked it so much that he 1 it on his home answering machine, which would lead to one of the most 2 friendships of his life. 

When Phil returned from his vacation, he listened to his voice

3 . One gentleman caller 4 for dialing the wrong number. But, he added, he'd really enjoyed the poem. Phil thought nothing more of it—until the phone rang a few days later. 

Phil 5 John's hollow voice immediately, who said sorry to

6 , but he was calling to hear the poem again. The two men talked. It turned out that he had 7 to phone his brother, but dialed the wrong number. Before hanging up, Phil told John to 8 anytime, whether to hear the poem or just to have a chat. 

That was 11 years ago. They've spoken on the phone a few times a month ever since. It is John who is still the starter of most calls. However, Phil will ring if a long while has passed. Not 9 , John has been in poor health. His special voice is just the 10 of some heart trouble. They seem to always 11 when there's been a big sports event. The men like to discuss football most. John will also 12 Phil on his life. Slowly, their conversations have grown much more 13 . They planned to meet twice, but circumstances went against them. Their friendship is based on the 14 act of picking up the phone. "My best friend is someone I've not yet met 15 ," says John.

As I walk into the big room at school, I'm wearing my white coat that doctors usually wear. But I also have on some funny 1 and a messy wig that makes me look like a crazy scientist. My name tag says "Professor Quantum Quirks," which makes people laugh.

Inside the room, there are a lot of 2 getting ready for a science fair. They look excited but also a little 3 . I notice one boy sitting by himself, looking 4 because his science project isn't working right. I go over to him and 5 he's having a hard time with it. I feel bad for him. So, I decide to 6 him by doing a fun experiment together. We 7 a mini volcano using simple things we can find at home. He starts to 8 himself and gets excited when the volcano erupts with bubbly stuff. Other kids see us having fun and come over to 9 . We do more cool experiments with them and everyone is 10 and having a good time.

By the end of the science fair, I 11 my wig and glasses, but I'm still 12 because it was so much fun. I hope the kids keep being 13 about science and discovering new 14 . After all, asking questions and exploring is how we learn and have fun in the world of 15 .

The Aviation Industry Corporation of China (AVIC), China's leading aircraft maker, created the country's first fully solar-powered drone (无人机). The large drone, Qimingxing 50, took off at 5:50 pm on September 3rd, 2022, from an airport in Yulin of Shaanxi Province and stayed in the air for 26 minutes before landing on the same runway. AVIC said that all systems of the unmanned plane functioned well on its first flight.

Powered by six electric motors with solar batteries, the drone is designed to conduct long-time operations in near space. Near space is that part of Earth's atmosphere at altitudes of 20 to 100 kilometers. It is above the top altitudes of commercial airliners but below orbiting satellites.

Qimingxing 50, also called "quasi-satellite", features high operational efficiency and eco-friendliness and will be tasked with high-altitude reconnaissance (侦察), forestry fire monitoring, atmospheric environmental inspection, aerial mapping, communication signal relay and other operations.

"Thanks to its capability to conduct very long endurance flights in near space, the drone can essentially become a substitute for satellites," a Chinese aerospace expert said. Satellite services are not always available due to the limited number of satellites and relatively fixed schedules of overhead passes. In time-sensitive missions, near-space drones can offset these disadvantages, the expert said, noting that satellite services could also be damaged in wartime, so near-space drones could replace them in this occasion.

The successful first flight of the Qimingxing-50 lays a solid foundation for the development of key technologies in the country's new energy field, the composite (复合的) material field, which will enhance China's ability to perform tasks in near space and over far oceans. AVIC will seize the opportunity to increase investment and speed up the development of large solar-powered unmanned aircraft.

In 1999, John Smith, a high-school teacher decided it was time to retire. Together with his wife Helen, he set off on a journey around Australia. But when they returned, John found he missed the classroom, so he spent another eight years doing casual teaching.

Then he heard about a program known as Volunteers for Isolated Students' Education (VISE), which pairs up energetic people with educational experience, usually retired teachers, with children whose schooling is largely done remotely, because they live too far away from towns and cities to attend regular schools. John grew up in the country and as a kid in the bush, he always dreamed of running with circus, but he didn't even have much chance to see the circus in person. Therefore he was immediately interested in the program and got a travelling post as a teacher with Stardust Circus.

The lesson timetable was built around the kid's performance schedules. "The eight-year-old I tutored was an awesome gymnast who was part of the teeterboard(跷跷板) act," he explains. "A big guy would jump on the other side, he would swing up in the air, do a couple of twirls(旋转) and land on his uncle's shoulders, and his uncle was standing on the boy's father's shoulders!"

The circus still includes some animal acts, including lions, monkeys, horses, goats and pigs. John and his wife Helen found it extraordinary enough to sink into sleep to the sound of lions roaring, but one day the lion-trainer, Matt, gave him a very special privilege,inviting him in to meet four 13-month old lions in person. While it was understandably a little scary at first, for John it was a never-to-be-forgotten experience, which helped him realize his boyhood dream in ms 75th year.