3 . In the rich countries of the West, the electric vehicle revolution is well occurring. Climate-conscious consumers drive Teslas or Polestars for reasons of morality (道德) and fashion. Poorer countries are also experiencing a wave of electrified trend. In Bangladesh, electric three-wheeler taxis, known as tuk-tuks, are rapidly replacing gas-powered ones on the streets. Such electric vehicles are climate friendly, cost effective, and help reduce air pollution.

Yet a glance under the hood (引擎盖) of these vehicles shows a poisonous secret: each tuk-tuk runs on five massive lead-acid batteries (铅酸电池), containing almost 300 pounds of lead (铅) in total. Every year and a half or so, when those batteries need to be replaced and recycled, about 60 pounds of lead leaks into the environment. Battery recycling, often at small-scale unregulated factories, is a highly profitable (高利润的) but deadly business.

Lead is dangerous, and any exposure to it is harmful to human health. Lead that has entered the environment hurts people on an unexpected scale. The numerous ways lead enters air, water, soil, and homes across the developing world and the enormous damage it does to human health, wealth, and welfare cause one of the biggest environmental problems in the world yet receives little attention.

The World Bank estimates that lead kills 5.5 million people per year, making it a bigger global killer than AIDS, malaria, diabetes, and road traffic deaths combined. On top of the shocking deaths, the social burden of lead poisoning is heavy, as is its contribution to global inequality — our research on the cognitive (认知的) effects of lead poisoning suggests that it may explain about one-fifth of the educational achievement gap between rich and poor countries.

But unlike many challenges faced by developing countries, lead poisoning is a problem that can be resolved through financial investment (财政投入). Better monitoring, research, and rules can help protect children all over the world from the unpleasant effects of lead poisoning and reduce the massive global costs it brings.

5 . London’s Must-See Exhibitions

This year is zipping along at quite a speed, and London’s already witnessed some great exhibitions. But big treats are still to come.

Van Gogh’s Sunflowers and Starry Night at Tate Britain

A major exhibition at Tate Britain, which examines how Van Gogh was inspired by British art, and how he in tun inspired British artists. His famous painting Sunflowers fills the gallery with joy.

The EY Exhibition: Van Gogh and Britain at Tate Britain. Until 11 August, £22.

Glass Master at Kew Gardens

Dale Chihuly creates sculptures out of glass that we would normally think impossible. With 32 of his sculptures around Kew Gardens, we’re looking forward to Kew becoming even more beautiful than it already is.

Chihuly at Kew: Reflections on Nature at Kew Gardens. 13 April-27 October, £13. 75.

More of Moore at Museum of London

Henry Moorr is best-known for his abstract figure sculptures. What many won’t know about is his obsession (痴迷) with armour (盔甲) , and the sculptures he created inspired by Renaissance armour. Actually, they’re going on display at Museum of London, next to the armour that inspired them.

Henry Moore: The Helmet Heads at Museum of London. Until 23 October, £11.

Shining a Light on Rembrandt at Dulwich Picture Gallery

Dulwich Picture Gallery commemorates 350 years since the death of Rembrandt with an exhibition on the man who mastered the use of light and dark in his paintings. The last Rembrandt exhibition in London was superb.

Rembrandt’s Light at Dulwich Picture Gallery. 2 October-2 December, £15.

Peking Opera is     1     form of traditional Chinese theatre which combines music, vocal performance, mime, dance and acrobatics. It arose in the late 18th century and became     2     (full) developed and recognized by the mid­19th century. The form was extremely popular in the Qing Dynasty court and has come to be regarded as one of the     3     (culture) treasures of China. Major performance troupes (剧团)     4       (base) in Beijing and Tianjin in the north, and Shanghai in the south. It has also spread to other countries such as the United States and Japan.

Peking Opera comes     5    four local operas, Hui Opera in Anhui, Han Opera in Hubei, Kun Opera in Jiangsu and Qingqiang in Shaanxi. It has drawn the merits of these local operas and created its own style.

Speech, song, dance and combat     6     (be) the four classic performing arts in Peking Opera, which are also the basic     7     (skill) for performers and is usually trained since the performers are very young. There are many roles in Peking Opera, mainly Sheng, Dan, Jing, and Chou, each of     8     has its own costume and mask­paintings. Masks with different colors have different meanings, which is used     9    (represent) the character of the roles and illustrate their emotional state.

No China trip is complete without     10     (watch) the classic Peking Opera! Enjoy the fantastic Peking Opera!

9 . Nanjing Yunjin brocade is traditional Chinese silk art with a history of about 1,600 years. Its complex weaving (编织)techniques, various colors and patterns, and its particular choices of materials make it valuable and ancient people said, “An inch of brocade, an inch of gold.” Today, the traditional characteristics and unique skills of yunjin remain to be an award-winning art treasure. Its techniques are passed down from generation to generation by artisans.

Zhou Shuangxi, a national-level inheritor (继承人) of yunjin weaving techniques, is one of them. Back in 1973, he graduated from a mining school and was selected to become a student at the NanjingYunjin Research Institute along with five other students, just because he was “in good shape”. There were only several masters in their 70s and not even a loom (织布机) to use. “The old masters finally remembered a loom was stored somewhere. When I opened the door, I saw what seemed like a pile of wood,” Zhou recalled.

“Weaving was difficult, but different from mining. Mining requires heavy physical labor, but working with the soft and thin silk requires studying and practicing in front of a loom for decades until you master the technique. My hands became quite awkward due to mining, so I used to put my hands in warm water whenever I could. In this way, they could become softer and weave the silk more easily,” he said.

Out of the six or so students, Zhou is the only one who has insisted on the trade to this day. Having devoted the past five decades to yunjin production despite all the sweat and struggles, he has developed his techniques to the point where he can weave the antique dragon robes in all their small details. He also made various artworks that not only show China's intangible cultural heritage but also serve as Zhou Shuangxi's artistic creations.

“I am lucky to be in such a good era and I have the honor of being a representative inheritor,” Zhou said.

10 . How to save money to visit Shanghai Disneyland?

The “happiest place on earth” is a top destination on many families’ bucket lists. But taking a vacation to Disney World can be difficult to do on a budget. There are some considerations that you can make to reduce the cost of your Disney World vacation.

Disney has influenced practically every industry, which makes it easy to find Disney items anywhere, from Walmart, Target, and your local grocery store to department stores and Amazon. You can save a lot of money by purchasing items before your trip at these less-expensive places than at Disneyland.

An autograph book is seen as a must-have by many Disneyland enthusiasts and is a memory you can take home with you. These books can cost anywhere from $7.95 to $19.95 at the Disney Store and up to $30 for the latest-and-greatest autograph book at Disneyland, such as the park’s 60th anniversary edition. Other choices can get the job done for under $5.For example, you can buy a small photo album, cute pads or notebooks.

Breakfast is almost as pricey (昂贵的) as lunch or dinner if you eat inside the Disneyland parks. If you have a hotel with a free breakfast, take advantage of it. If you want to eat out, eat at a local restaurant that is inexpensive or has a kids’ menu, such as McDonald’s which is close to the park.

Disney offers a wide variety of discounts, including for military service members, college students, teachers, and youth groups. If you think you might qualify for a special discount or group rate, call the Disneyland Resort to book tickets.