2 . There is nothing like a coast redwood. It is the planet’s tallest tree, up to heights of more than 320 feet into the sky. With trunks that grow to more than 27 feet wide, they can live for over 2,000 years. Some of them living today were alive during the time of the Roman Empire (帝国).

Coast redwoods have survived through thousands of years of natural floods, droughts, tsunamis and fires. They can thrive (茁壮成长) and recover from damage as long as they can count on rainwater and coastal fog banks that roll in every morning. And it is those critical water sources that are disappearing as temperatures continue to rise. The damp conditions the trees like are rarer than they used to be. Coast redwoods now occupy less than 10 percent of their original range.

Their loss will have some consequences, particularly in the vast amount of carbon they store. Redwoods can store 2,600 metric tons of carbon per hectare, more than double the absorption rate of the Pacific Northwest’s conifer trees (针叶树), according to a new research published in Forest Ecology and Management.

David Milarch, an arborist from Michigan, says he feels sorrowful about the disappearing redwoods. He spends his days tracking down the healthiest coast redwood specimens (样本) he can find, cloning them in his own lab, and then planting them in carefully chosen places where they can thrive. Milarch’s goal is both to strengthen the coast redwood gene pool with clones of the strongest individuals, and to store loads of carbon. It’s a complicated mission with a simple philosophy: save the big trees, and they’ll save us.

Milarch explains that we need a practical and measurable solution to fighting against climate change. He believes the redwoods are the answer. However, scientist Mark Maslin cautions against viewing tree planting as a magic bullet, since even fast-growing trees take a long time to grow and be mature enough to reach their maximum carbon-trapping time which climate change cannot afford. As a global society, the most important thing we should do now is to reduce our overall carbon emissions if we want to have any impact on the planet’s climate crisis.

You may think you cannot live through summer without air conditioners. But in ancient China, hand fans were almost the only help for people       1     (drive) the heat away.

Chinese people started to use hand fans over 2,000 years ago. The fans came       2     different shapes, such as round and square and they were made from various materials. Palm leaf fans were cheap and easy to make. Feather fans showed the owner’s high status. Sandalwood fans     3     (send) out a fragrant smell.

    4     (late), hand fans became more than something     5     could cool you down. They developed into art works, in which tuanshan and zheshan were the most common.

Shaped like     6     full moon, tuanshan was usually made of silk. They had beautiful embroidery(刺绣) featuring birds and flowers on them. Females, especially     7    (woman) in the royal palace,liked to use them. Poets in ancient China often compared a woman’s abandoned fate to tuanshan. A poet wrote during the Qing Dynasty, “If only life were as     8     (beauty) as when we first met, why should the autumn wind bother to pity deserted painted fans?”

Meanwhile, men, especially the literati (文人), used zheshan. The literati liked them because they could paint and write poems on them.     9     was a way for them to show off their talent in literature, painting and calligraphy. Almost anything could     10       (paint) on zheshan, but the most popular ones usually featured landscapes.

5 . A new smartwatch app warns users who are deaf or hard of hearing about nearby sounds, such as microwave beeps or car horns.

“The main motivation came from my own experience, and conversations that my colleagues and I have had with deaf and hard of hearing people over several years,” says Dhruv Jain, who presented the system, called SoundWatch, at the virtual ASSETS conference on October 28.

Jain, who is hard of hearing, uses SoundWatch at home to avoid sleeping through a smoke alarm. “On a nature walk, it’ll tell me that there’s birds chirping (吱喳叫), or there might be a waterfall nearby,” he says. “Those sounds make me feel more present and connected to the world.”

Sound awareness apps for smartphones exist. But Jain prefers the immediate sound notifications (提示) on his wrist, rather than in his pocket — and surveys of people who are deaf or hard of hearing show he’s not alone.

The SoundWatch app pairs an Android smartwatch and phone. The watch records surrounding noises and sends that data to the phone for processing. When the phone detects a sound of interest, the smartwatch vibrates and displays a notification.   

Jain, a computer scientist at the University of Washington in Seattle, and colleagues designed the app to identify 20 noises. In experiments, SoundWatch correctly identified those 20 sounds 81.2 percent of the time. When set to listen only for urgent noises — a fire alarm, door knock or alarm clock — the app was 97.6 percent accurate. Eight deaf and hard of hearing people who used SoundWatch around a university campus gave the app broadly favorable reviews, but noted that the app misclassified some sounds in noisy outdoor settings.

Jain and colleagues are now working on a version of SoundWatch that users can train to recognize new sounds, such as their own house alarm, using just a few recordings.

9 . Inside а tiny shop in Manchester, Adam Birce carefully carves at а woodblock. He looks carefully at each piece to ensure they fit and match before gently setting them together. Adam Birce, the owner of Four Strings, restores stringed instruments like violins, and his passion is restoring and appreciating what has already been crafted and loved.

Birce started playing the violin in grade school and grew to truly appreciate it. He played semiprofessionally out of high school and later got his degree in music at Virginia Commonwealth University as a violinist. After graduating, he landed a job selling violins. “As fate would have it, I was asked by my employer to learn to fix violins 15 years ago,” he says. “I soon moved off on my own to do restoration.” Since 2014, he has been on a mission with Four Strings to offer excellent fine-instrument restoration services to the community.

Violin restoration isn’t a self-taught skill. Each summer for the past decade, Birce has traveled to the Massachusetts College of Liberal Arts for up to two weeks to study under famous violin restoration expert Hans J. Nebel. Here, students learn everything from delicate edging repair to violin identification. “A lot of the work itself is learning as you go,” Birce says. “It’s a lot of problem-solving and critical thinking, like coming up with a woodworking plan.

“How long а job takes varies. Most are about 3-6 months for major work, unless a full top-to-bottom restoration is needed, which can take even longer,” Birce explains. “I leave that up to the client if they want to commit to that.” One of his longest jobs was working on a Scottish violin from the early 1800s that had been water-damaged. “I had to use every skill in my toolbox to fix it,” Birce laughingly recalls. “It was a very onerous job.”

If there’s one thing to be learned from Birce’s passion, it’s that each violin is unique in its own right. He compares the fine instruments market to the fine arts market. “A lot of these instruments are fine art,” he says. “I kind of say this is a Picasso I’m playing or a Degas. I’ve worked on a few, which is always a joy.”

10 . Now more companies are experimenting with the concept of connected clothes. Among the pioneers is London based Cute Circuit, which has been creating fashionable smart clothing since 2004. The company’s latest innovation is the “Sound Shirt”, which allows deaf people to “feel” live music by transforming the tunes into touch sensations (感受) in real time.

The fashionable jacket uses software that changes the music into data and wirelessly sends it to the 16-micro motors fitted inside the clothing’s fabric (布料). The devices shake with the intensity (强度) of the music being played, allowing the wearer to feel each instrument individually. For example, violins can be felt on the arms, while the deeper, heavier bass notes can be felt close to the stomach. The series of touch like sensations across the wearer’s body enable him or her to feel the entire music, resulting in a musical experience.

To ensure the shirt is comfortable, the designers chose to leave out wires and instead wove conductive textiles (导电纺织品) into the garment’s fabric. Francesca Rosella, chief creative officer of Cute Circuit, explains, “There’re no wires inside, so we’re only using smart fabrics — we have a combination of micro-electronics and very thin and flexible and conductive fabrics. All these little electronic motors are connected with these conductive fabrics so that the garment is soft and stretchable.”

Cute Circuit, which has been testing the Sound Shirt for three years, expects to make it available to the general public shortly. Priced at $3,673, the smart jacket won’t be cheap. However, twin sisters Herman and Heredia Breanne, who lost their hearing at a young age, believe the hi-tech garment is a worthwhile investment, especially for deaf people with a passion for dancing. “It’s almost like feeling the depth of the music,” says Herman. “It just feels as though we can move along with it.”