Thirty-six visually-impaired (视力缺损的) visitors head to the Hulun Buir grassland in north China’s Inner. Mongolia. Li Manshuo is one of the volunteers    1    (accompany)them. Her “job” is to help three group members “experience” the sights as best they can.

Li is studying    2     a master’s degree in tourism management and she’s using her midterm break to undertake the trip. “Visually-impaired travelers get the experience     3    (main) through smelling or listening, or touching with their hands,” Li says. “Also, with our     4    (describe), they can create a picture of the scene in their minds.”

Guiding instead of taking over, Mei Zhiyu is the director of Zhisu Commonweal Organization, a Suzhou-based non-profit organization that, through    5    (it) own travel agency, has given more than 1, 000 brave blind and low-vision travelers the chance    6    (explore) places all over China.

Before a tour sets out, the volunteers, each of     7     is normally assigned to two or three travelers, receive safety instructions and basic training. Throughout the trip, their performance     8    (assess) by Mei on a daily basis. “The most important thing is not to think of them as incapacitated people,” he says.

“Actually, most visually-impaired people have a     9    (great) capacity to look after themselves than we think, and we try to offer them the same experiences as sighted travelers.”

Mei likes his role to work like a bridge, connecting the visually-impaired to the outside world. “Even though they can’t see,”he says, “they can experience     10     world in other ways.”

TED Talks are really cool. But do you know what TED stands for and where it comes from? In February 1984, a group of technology enthusiasts     1    (gather) in Monterey, California, to share thoughts on three subjects—technology,     2    (entertain) and design. It was the start of the acronym (首字母缩略词) and the organisation TED.

Then in 2001, Chris Anderson,     3     magazine entrepreneur (企业家) purchased TED through his non-profit foundation from TED co-founder Richard Saul Wurman. The style of TED then went from a closed conference     4     an open platform for spreading ideas. Indeed the organisation’s motto is “Ideas worth     5    (spread)”, and the new website TED.com makes that     6    (true) happen.

The organisation really didn’t assume its current form and its expansive (广泛的) public footprint until 2006. In 2006, TED’s leadership decided to put its collections of     7    (record) talks online for free. The thinking was     8     there were limits to how much impact a talk could have if its audience was only a thousand people, even if those people were influential ones. Back then, it     9    (consider) a risky and even radical move. But now, TED staff members can give a series of 1.9 million TED Talk video views a day, 1,600 plus TED Talks online, 9,000 TED     10    (event) in 157 countries.

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5 . The Economic and Social Council (ECOSOC) Youth Forum is an annual initiative of the President of the Council. It has developed into a key platform where young people can contribute to policy discussions at the United Nations (UN). This year’s Youth Forum will take place from 25 to 27 April, 2023.

·Objectives

The Forum aims to engage young people in a dialogue with Member States, policymakers and other actors to voice their views and inspire actions on how to transform the world into a better place guided by the Sustainable Development Goals (SDGs). Participants will also have the opportunity to contribute to the preparatory process of the SDG Summit.

The 2023 Forum will address the theme on speeding up the recovery from the COVID-19 and the full implementation (实施) of the 2030 Agenda for Sustainable Development. It will also review progress in the areas of affordable and clean energy, and sustainable cities and communities, ete.

· Format

The three-day event will feature plenary (全体出席的) sessions and regionally based discussions, with the last day designed for the preparation of the 2023 SDG Summit. Talented youth speakers will deliver short presentations in between sessions.

Participation in the Forum is by invitation only. The youth participants are selected by National Youth Councils, regional youth organizations, etc.

The event will be held in a mixed way allowing for opportunities for in-person and virtual participation. Participants will also be able to ask questions via social media.

· The voices from last year’s participants

Oysters, soft-bodied animals without skeletons, are important for the underwater community they share with plants, fish, and other life. They are food     1     crabs and other animals. As new oysters grow, they attach their shells to older ones,     2     (form) bigger reefs with many small spaces     3     other animals live. Oysters eat algae (藻类). If algae grow too fast, they can exhaust oxygen from the water—and even fish need oxygen     4     (breath)!

Because so many animals depend on them, oysters are called a keystone species. If a keystone species     5    (disappear), other plants and animals may die off and not grow back.

That’s     6     (exact) what happened 100 years ago in New York Harbor—a group of rivers and bays around New York City. Before then, lots of oysters lived in these waters. The oysters were famous! They     7     (ship) to restaurants around the world. The oysters were delicious—maybe too delicious. By the early 1900s, people were eating them faster than they could grow.

The oysters were in trouble for     8     reason. Pollution was pouring into the waters of the growing city. The harbor became so     9     (pollute) that few types of animals could live in it. Since the 1970s, new laws     10     (help) reduce toxic waste. Some fish started to swim through again. But oysters were still missing—until recently.

10 . ChatGPT--a conversational language model which was launched in November and is free and simple to use -- can swiftly produce poems, math equations or essays on topics, bringing concern that students will misuse the technology. And because it doesn’t copy an existing text, there is no easy way to be certain whether a human or a bot wrote the answer.

As many educators began to worry about whether students may use ChatGPT to generate papers, Edward Tian had an idea. The 22-year-old student, who studies computer science and journalism, decided to build an app to detect whether a text- was human-written or AI-written.

Over a few days in a Toronto coffee shop during winter break, he got to work. On Jan. 2, he launched’ GPTZero. It analyzes different properties of a text for its “perplexity”, which is the randomness of the text, and the “burstiness”, which is the variation of the text over time. So, a human-written text would have high perplexity, something very unfamiliar to an Al model, and exhibit properties of burstiness, which are non-common items that appear in random clusters (集 群), rather than being uniformly distributed.

Tian said he expected a few dozen people to ever try it. But he woke up the next morning stunned by the response. He has even heard from people all over the world— many of them are teachers or college admissions officers, Many people have subscribed for updates from Tian as he works to improve the technology.

The quick response to Tian’s effort highlighted the breakneck pace at which technology is changing classrooms, teaching, and the ways that people define and understand learning. Tian believed everyone deserved to reap the benefits of Al, but safeguards were needed to make sure new technologies were not abused.

Tian said it would be sad if, years from now, people mostly relied on AI and writing became far more uniform. “There’s something implicitly(含蓄地) beautiful in human prose,” he said, “that computers can never copy.”