As is often the case, when your teacher asks a question, there is only one correct answer. But there is one question that has millions of current answers. That question is "What's your name?" Everyone gives a different answer, but everyone is correct.

    Have you ever thought about people's names? Where do they come from? What do they mean?

    People's first names, or given names, are chosen by their parents. Sometimes the name of a grandparent or other member of the family is used. Some parents choose the name of a well-known person. A boy could be named George Washington Smith; a girl could be named Helen Keller Jones.

    Some people give their children names that mean good things. Clara means "bright"; Beatrice means "one who gives happiness"; Donald means "world ruler"; Leonard means “as brave as a lion”.

    The earliest last names, or surnames, were taken from place names. A family with the name Brook or Brooks probably lived near brook(小溪); someone who was called Longstreet probably lived on a long, paved road. The Greenwood family lived in or near a leafy forest.

    Other early surnames came from people's occupations. The most common occupational name is Smith, which means a person who makes things with iron or other metals. In the past, smiths were very important workers in every town and village. Some other occupational names are: Carter — a person who owned or drove a cart; Potter — a person who made pots and pans.

    The ancestors of the Baker family probably baked bread for their neighbors in their native village. The Carpenter's great-great-great-grandfather probably built houses and furniture.

    Sometimes people were known for the color of their hair or skin, or their size, or their special abilities. When there were two men who were named John in the same village, the John with the gray hair probably became John Gray. Or the John was very tall could call himself John Tallman. John Fish was probably an excellent swimmer and John Lightfoot was probably a fast runner or a good dancer.

    Some family names were made by adding something to the father's name. English-speaking people added –s or –son. The Johnsons are descendants of John; the Roberts family's ancestor was Robert. Irish and Scottish people added Mac or Mc or O. Perhaps all of the MacDonnell's and the McDonnell's and the O'Donnell's are descendants of the same Donnell.

    Do you love traveling? If the answer is yes, then have you ever thought about why? You may argue that traveling can help you enrich your knowledge, especially geographical and historical learning. It will provide more chances for you to enjoy food and try on clothes that you otherwise cannot possible have. A famous English author Francis Bacon (1561-1626) makes a point when he says that, “Travel, in the younger sort, is a part of education; in the elder, a part of experience.”

    Evidence of leisure travel can be traced as far back as ancient Babylon. This year, according to the World Travel & Tourism Council, the 1 billionth tourist will cross an international boundary before the end of this month. That means that one in seven people on the planet traveled this year, something that would not have been possible a few decades ago. Around 20 years ago only the rich could travel.

    While the US and France remain the two largest destinations for world travel, experts say much of the explosive growth in tourism has been to countries like Guatemala, the Dominican Republic, and the Ivory Coast, which weren't even on the world tourism map a decade ago. The top five destinations in the world, according to the United Nations World Tourism Organization, are Paris, London, New York, the Mediterranean, Turkey.

    Several factors have led to the boom in world travel. The prosperity (富裕) of people in Asia is one factor. People in Asian developing countries have lifted their incomes above middle-class levels in the past few years. And a lot of them have used their new wealth to travel. In addition, travel costs have been reduced thanks to the rapid development of transportation, and competition between airlines to give customers the best prices.

    Wild animals are our friends, but many of them are getting fewer and fewer. We should try to protect them. The four animals below are now in danger.

     Tibetan Antelopes

    Tibetan antelopes are medium - sized animals. They mainly feed on grass. They are usually found in groups of about 20. They are killed for their wool, which is warm, soft and fine and can be made into expensive clothes. Although people can get the wool without killing the animals, people simply kill them before taking the wool. The number of them is dropping year by year. There are less than 75,000 Tibetan antelopes left in the world, down from a million 50 years ago.

    Golden Monkeys

    Golden monkeys are mainly found in Sichuan, Gansu, Shanxi provinces and Shengnongjia mountainous area of Hubei Province. Golden monkeys have golden - orange fur. They move around in the daytime, usually in groups of as many as 100 to 200 heads, or 20 to 30 heads. They feed on fruits and young leaves of bamboos. But people are destroying the environment where they live. Trees and bamboos are disappearing, so golden monkeys have less and less to eat.

    Elephants

    Elephants are very big and strong. They are bigger than any other animals on land. They are grey and have long trunks and tusks. They have poor eyesight, but very good hearing and smell. They can lift heavy things and break down branches with their trunks. Elephants are very friendly towards each other and towards their neighbours. Normally, they live in a group for many years. Young male elephants do not leave the group until they are about 12 years old. Now, there are very few elephants in the world. The number of them is becoming smaller and smaller because their living areas are used for fanning. Also, people hunt them for their tusks.

    Wolves

Wolves are not very big. They have grey fur. Solves have very good eyesight, hearing and smell. Wolves' food is various. They eat animals, insects and snails. They are friendly to each other and never attack people. They do not kill for fun. Wolves are in danger, too. They are losing their living areas because people cut down forests. Soon they will have no home or food.

    October 15th is the Global Hand washing Day. Activities are planned in more than 20 countries to get millions of people in the developing world to wash their hands with soap（肥皂）. For example, donators（捐献者）will give 150,000 bars of soap to schools in Ethiopia.

    Experts say people around the world wash their hands every day, but very few use soap at so-called important moments. These include after using the toilet, after cleaning a baby and before touching food.

    Global Hand washing Day is the idea of the Public-Private Partnership for Hand washing with Soap. Partners include the United Nations Children's Fund, American government agencies, the World Bank and soap makers Unlever and Procter and Gamble. The organizers say all soaps are equally effective at removing disease-causing germ（细菌）. They say the correct way to wash is to wet your hands with a small amount of water and cover them with soap. Rub it into all areas, including under the fingernails. Rub for at least twenty seconds. Then rinse well under running water. Finally, dry your hands with a clean cloth or wave them in the air.

    The Partnership for Hand washing says soap is important because it increases the time that people spend in washing hands. Soap also helps to break up the dirt that holds most of the germs. And it usually leaves a pleasant smell. The Partnership for Hand washing also says washing with soap before eating or after using the toilet could save more lives than any vaccine（疫苗）or medicine. Hand washing could also prevent the spread of other diseases. When people get germs on their hands, they can infect（传染）themselves by touching their eyes, noses or mouths. Then they can infect others.

A rainy day can be a chance to recharge. While you relax on the sofa with a movie, the raindrops falling on your windows might one day provide the power for your TV. This is the idea behind an invention that harvests energy from water. 

The technology is based on the triboelectric (摩擦电的) effect. An engineer at the University of Hawaii, David Ma knew that it was possible to generate electricity by rubbing two things together. So, he thought, "Why don't we use water?"

A drop of water sliding across a surface coated with two different materials would generate enough friction(摩擦) to create an electrical charge. By placing metal wires that the drop of water touched as it moved, it should be possible to harvest electricity, he reasoned. 

It worked. In fact, the researchers lit up 15 LED bulbs with a single moving water drop. 

This is not the first time that scientists have got electricity from water-generated friction. Earlier experiments, though, harvested the charge produced in a surface by a sliding drop of water. There, the surface had acted as an electrode(电极). This is different. The energy of friction is being harvested from the water itself. 

"The technology could someday power phones, sensors or other small electronics," says Christopher Oshman, an engineer at the Colorado School of Mines. "This work is a step towards harvesting the energy of moving objects all around us, including ourselves, to power the electronic devices we use every day," he says. 

"Ma has shown that the technology can work in a lab," Oshman says. Next, the Colorado researcher would like to see it tried on a larger scale, such as on an umbrella. 

When it comes to commemorating a child's first year of life, the traditional approach often involves presenting an exquisitely adorned confectionery masterpiece to the young celebrant. By simply setting this visually striking sugar creation before the infant and activating the recording devices, one can capture the ensuing delightfully chaotic scene, replete with smiles and smears of frosting.

However, this will not be the method I choose to honor my daughter's initial 12 months of existence—not because the sweet treat will be absent, but because my spouse and I have resolved to abstain from sharing her images on social platforms for an entire year, and we are determined to maintain this practice for the foreseeable future.

I understand that I am part of a select few. Research indicates that approximately seventy-five percent of parents habitually upload photographs of their offspring to the internet. Pixsy, a platform that assists photographers in identifying unauthorized usage of their work, discovered that parents in the age bracket of 20 to 25 are twice as likely as their older counterparts to disseminate images of their little ones on social media platforms.

Yet, I am not the only one who feels this way. A woman instrumental in the creation of Big Little Feelings—an Instagram account with 2.8 million followers that provides guidance to new mothers—recently decided to remove all the pictures she had previously posted of her children.

The discourse surrounding "sharenthood," or the inclination of parents to broadcast their children's lives online, has been fervently ongoing for some time. The everyday choices made by parents have a significant, yet often undervalued, impact on the digital legacy of young individuals and their subsequent life trajectory.

Technological advancements have introduced fresh challenges for parents. The latest development in artificial intelligence is the emergence of image-generating tools. By inputting a series of descriptive terms into a text field, AI can generate a visual representation of the described subject. The datasets for these AI-driven generative systems are frequently sourced from the open internet.

While it is improbable that my daughter's Instagram photos would be processed through such an AI assembly line, resulting in her likeness appearing in someone's creative AI-generated artwork, once images are disseminated on the web, they can be exceedingly difficult to eradicate completely.

I do share photographs with friends and family via secure, private messaging applications. However, these closed networks are fundamentally distinct from public postings on the open internet.