4 . If Dhruv Rebba, an Indian American, had to live on a remote island, he would bring a ham radio kit (业余无线电设备) along. “The island wouldn’t have cellular connectivity (蜂窝数据连接), of course. Ham radio would be the best option to contact someone as it uses the ionosphere (电离层) to communicate instead of cellular towers. “That’s why we use it when mobile phone networks are destroyed during natural disasters,” he said in an interview.

When Rebba was nine, he received his ham radio technician license, becoming the youngest person of Indian origin then to receive it. “My dad has been a ham radio operator for the past 25 years. When I was in the third grade, I persuaded him to take me along to the Dayton Hamvention, where I was totally amazed by some cool stuff including Morse code keyers. From then on, I decided to go further in this field,” Rebba said.

In 2017, Rebba was part of the Amateur (业余的) Radio on the International Space Station(ARISS) project. It involves amateur radio operators across the world, speaking directly to astronauts through their radio stations. After three tries, I received the approval. As I have an amateur radio license, I was able to make my initial contact. 16 students across America were given the chance to ask Joseph M. Acaba, who was then on the International Space Station(ISS), 23 questions, Rebba explained.

Besides being a ham radio operator, Rebba is also the CEO of Universal Help Foundation. “I once visited my dad’s village in India where I noticed the gap in the standard of living. That’s what stimulated me to start Universal Help Foundation—to create an impact,” said Rebba. He named the foundation Universal Help Foundation rather than limiting it to environmental sustainability or disaster relief. Instead, he wanted to bridge the gap.

Meanwhile, Rebba hopes to get further high up in space. However, the overall picture of the ham radio field is unpleasant. “The ham population is aging and fewer youngsters are drawn to it. Now we all have cell phones and the younger crowd doesn’t see the everyday use of ham radio as important,” Rebba added.

According to Xinhua News Agency, the Palace Museum and Huawei signed a cooperation agreement     1     March 15. The two sides will set an example for 5G application.

The Palace Museum received more than 17 million visitors in 2019,     2    (make)it the most visited museum in the world. In the past 20 years, an office information network covering the whole museum     3    (build)gradually. The museum has developed an App that     4    (provide) an in-depth explanation of cultural relic information and cultural services. Also the museum has researched on the application of VR, AR, AI in museums.

    5     signing of the agreement marks a new chapter in the strategic cooperation between the Palace Museum and Huawei Technologies Co. So Huawei will make efforts     6    (speed)up the intelligent construction of the Palace Museum.

“The 600-year-old Palace Museum has never been so close to science and technology.” Shan Jixiang said     7    (proud), former director of the Palace Museum.

Shan shared many ideas about the 5G Palace Museum. With the help of     8    (advancer)technology,     9     expected that in the future, audiences around the world will be able to experience and visit the Palace Museum, whether is a field trip or a virtual. Also, the use of AI technology provides a     10    (broad)platform and stronger knowledge support for cultural relics among young people.

8 . Bangladesh’s floating gardens, built to grow food during flood seasons, could offer a continuous solution for parts of the world which are likely to suffer from flooding because of climate change, a new study has found.

Bangladesh’s floating gardens began hundreds of years ago. The gardens are made from native plants that float in the rivers and operate almost like rafts (筏), rising and falling with the waters. Historically, they were used to continue growing food during rainy seasons when rivers were filled with water.

But as climate change caused floods, the researchers wanted to know whether Bangladesh’s floating gardens could be a continuous farming practice. They interviewed farming families and found strong evidence that floating gardens provide stability, both in the amount of food to feed rural people and in a farming family’s income.

They found that farmers usually use hybrid (杂交植物) seeds, which must be bought each year, to grow different vegetables in the floating gardens. The gardens are also sensitive to pests so farmers end up spending some money on both pesticides (杀虫剂). But even with these expenses, they found, benefits outweighed costs. One farmer told the research team that he earns up to four times as much money from the gardens as from traditional rice fields.

However, before making money, farmers often take out high-interest loans to cover the investment costs. Luckily, there are also lower-interest loans from responsible government or non-governmental organizations, which could ease that burden.

9 . Millions of people pass through the gates of the Disney parks in California, Tokyo and Shanghai each year. What makes these places almost universal attractions? What makes foreign kings and queens and other important people want to visit these Disney parks? Well, one reason is the way Disney serves their “guests”.

All new employees, from vice-presidents to part-time workers, begin their employment by attending Disney University and taking “Traditions”. Here, they learn about the company’s history how it is managed and why it is successful. They are shown how each department relates to the whole. All employees are shown how their part is important in making the park a success.

After passing “Traditions”, the employees go on to more specialized training for their specific jobs. No detail is missed. A simple job like taking tickets requires eight-hour days of training. When one ticket taker was asked why it took so much training for such a simple, ordinary job, he replied, “What happens if someone wants to know where the restrooms are, when the parade starts or which bus to take back to the campgrounds? We need to know the answers or where to get them quickly. Our constant aim is to help our guests enjoy themselves.”

Even Disney’s managers get involved in the daily management of the park. Every year, the managers leave their desks and business suits and put on special service clothes. For a full week, the bosses sell hot dogs or ice cream, take tickets or drive the monorail, and take up any of the 100 jobs that make the park come alive. “It means a lot,” one of them said, “Allowing us to see a bigger picture.”

All these efforts to serve the public well have made Walt Disney famous. Disney is considered by many as the best mass service provider in America or the world.

10 . From Italy to Indonesia, major restoration (修复) works are underway to preserve and improve some of the world’s most historic sites.

It’s seen beasts, battles and bloody executions and now the world’s most iconic arena (圆形运动场) is seeing a floor. An architecture company has decided to restore the Colosseum’s floor to its former glory and allow visitors to admire the nearly 2,000-year-old building from its centre, where gladiators (角斗士) once fought. Set for completion in 2023, the 32,300-square-foot surface will be made up of narrow pieces of wood that can let light and air into the rooms beneath.

Hadrian’s Wall marks its 1,900th anniversary this year and is set to receive £30 million in government and charity funding, with the goal of improving transport links and upgrading visitor centres. It’s hoped the wall will become one of the nation’s top landmarks.

After numerous setbacks following the 2019 fire, the restoration of the Notre Dame Cathedral Paris is set to pick up the pace. Charity Friends of Notre-Dame de Paris has made an appeal for donations to help preserve the church’s treasures. Donors can choose where their mopey goes—whether it’s on artworks, holy relics or the famous ugly character.

Coral reefs (珊瑚礁) are among the planet’s oldest ecosystems, but they face a dangerous future. At the Sheba Hope Reef, 19,000 reef stars have been planted as part of what’s praised as the world’s biggest coral restoration project. The program is led by cat food brand Sheba, whose aim to ensure a sustainable fish population benefits cats, as well as the 500 million people whose livelihoods depend on reefs.