The winter vacation is just around the corner. With such a long holiday to spend, have you decided where to get yourself relaxed from the great pressure of school study? Our company specializes in civil tours. We take pride in offering you the best services and in providing you with a vacation that will be fondly remembered. The following places can be your unforgettable destinations in our country.

    A. The Australian Museum

    The Australian Museum has an international reputation in the fields of natural history and indigenous studies research and exhibitions. The museum was established in 1827 and is Australia's first museum of natural science and cultural artifacts.

    B. Sydney Olympic Park

    Home of the Best Games Ever and 2003 Rugby World, Sydney Olympic Park is a gold medal attraction and continues to serve as a major sport and social venue.

    Apart from its ultra-modern sport venues, Sydney Olympic Park is set in extensive parklands. Bicentennial Park, one of Sydney's most popular recreational areas, is criss-crossed with walking and bicycle tracks.

    C. Art Gallery of New South Wales

    Located within a short walking distance from Sydney's CBD, the Art Gallery of New South Wales is one of Australia's foremost art museums housing some of the finest works of art in the country.

    The Gallery has a rich and diverse collection including key works of the Heidelberg School and favorite modern Australian artists including Brett Whiteley and Margaret Preston, as well as permanent Australian, European, Asian, contemporary and photographic galleries.

    D. Koalas Park Sanctuary

    Koalas are on show every day. Shows are at 10:20 A.M., 11:20 A.M., 2:00 P.M., 3:00 P.M. where you can cuddle, feed, pat and have your photo taken with the Koalas. See free roaming Koalas as well, 10 acres of rainforest. Walk in and pat our kangaroos.

    When Mark Levine, an English-language instructor at Beijing's Minzu University of China, was first invited to attend a Chinese colleague's wedding in Jiangsu Province in 2016, his second year in China, the California native was ready to present a small decorative gift for the new couple as he used to do in the United States.

    However, his gesture suddenly seemed inappropriate as he realized the Chinese at the ceremony had red envelopes filled with cash to present rather than a packed gift.

    "It's a little bit embarrassing when you present something that people didn't expect to receive on certain occasions," Levine told China Daily recently. "In the US, people do that as well but only for close relatives. People would normally give things as presents, while here in China red envelopes are more commonly welcomed."

    It was the first time that the 66-year-old had discovered the Chinese rules in gift giving. He was not alone.

    British Minister of State for Transport Baroness Susan Kramer presented a watch in January to Ko Wen-je, mayor of Taipei, when she visited the city, immediately sparking headlines as she broke a long-held tradition in Chinese culture.

    A clock or watch, or zhong in Mandarin, represents "the end" in Chinese, and many associate it with death. Therefore, giving someone, especially an elder, a clock or watch implies "your time is up".

    Kramer later apologized for the mistake, but Ko also came under fire for his response as he told reporters that he had no use for the watch and would sell it for cash.

    However, some foreigners in China stand by Ko in this particular debate, such as Mark Dreyer, a British citizen who has lived and worked in China since 2007."After all, 'don't give clocks or watches to your hosts' is on page l of most China travel guides. I'm embarrassed by the lack of respect shown by the British for not even reading about the customs beforehand."

    Your next car could have two seats, three wheels — two in front and one in the back and a top speed of more than 100 miles per hour. Elio Motors plans to make such a tiny car named the Elio. Its two seats sit front and back instead of side by side. The driver is positioned in the center with the passenger directly behind.

    The starting price for the car is just $6,800. It has only one door, on the left side, which cuts a few hundred dollars off the manufacturing costs. Having three wheels also makes it cheaper. It has air conditioning, power windows and door locks and an AM/FM radio. More features can be ordered through Elio's long list of suppliers. Elio will also sell the cars directly through its own stores and not through franchised dealers (特约经销商).

    Paul Elio dreamed as a kid that he would one day own a car company called Elio Motors. In 2008, tired of high gas prices, he started working on a car that burns gas in a more effective way. Equally important to him was creating U.S. manufacturing jobs and making the car inexpensive enough to attract buyers who might otherwise be stuck in their old, unreliable cars. “Whatever matters to you, this can move the needle on it,” he said.

    Already, more than 27,000 people have reserved (预订) one. Paul hopes to make 250,000 cars a year by 2016. So far, reservation holders are those who will use the Elio as a second or third car for work. Finally, though, he believes the car will interest high school and college students as well as used-car drivers who want something newer and more reliable.

    Barbara McClintock was one of the most important scientists of the twentieth century. She made important discoveries about genes and chromosomes (染色体).

    Barbara McClintock was born in 1902 in Hartford, Connecticut. Her family moved to the Brooklyn area of New York City in 1908. Barbara was an active child with interests in sports and music. She also developed an interest in science.

    She studied science at Cornell University in Ithaca, New York. Barbara was among a small number of undergraduate students to receive training in genetics in 1921. Years later, she noted that few college students wanted to study genetics.

    Barbara McClintock decided to study botany, the scientific study of plants, at Cornell University. She completed her undergraduate studies in 1923. McClintock decided to continue her education at Cornell. She completed a master's degree in 1925. Two years later, she finished all her requirements for a doctorate degree.

    McClintock stayed at Cornell after she completed her education. She taught students botany. The 1930s were not a good time to be a young scientist in the United States. The country was in the middle of the great economic Depression. Millions of Americans were unemployed. Male scientists were offered jobs. But female geneticists were not much in demand.

    An old friend from Cornell, Marcus Rhoades, invited McClintock to spend the summer of 1941 working at the Cold Spring Harbor Laboratory. It is a research center on Long Island, near New York City. McClintock started in a temporary job with the genetics department. A short time later, she accepted a permanent position with the laboratory. This gave her the freedom to continue her research without having to teach or repeatedly ask for financial aid.

    By the 1970s, her discoveries had had an effect on everything from genetic engineering to cancer research. McClintock won the Nobel Prize for Physiology or Medicine in 1983 for her discovery of the ability of genes to change positions on chromosomes. She was the first American woman to win an unshared Nobel Prize.

    Chester is one of the best cities in the UK. As soon as you arrive in Chester you will appreciate the city's unique atmosphere and sense of history. Founded by the Romans over 2,000 years ago, much of the Roman influence remains and Chester's city walls are the most complete in Britain. Combined with history and heritage(遗产), Chester is a dynamic city full of bars, pubs, clubs, hotels and restaurants for you to discover, tempting you to visit again and again.

    Travelling to Chester?

    Chester is easily accessible by many means of transport — whether you are travelling by rail, car, bus or plane. Please check our route planner below to help you plan your journey to Chester. Once you arrive in the city there are numerous car parks; however, during rush hours the easiest way to travel in Chester city centre is via park and ride facilities, which are parking lots with public transportation.

    Hotels?

    From bed & breakfasts to the luxury of Chester's only five star hotel, Chester has all covered. Whether your trip is for business or pleasure your room is just a click away!

    Sightseeing and Tours?

    One of the best ways to see Chester is by a guided tour and you have a variety to choose from. Whether you choose the traditional guided walk, to be guided around Chester's historical landmarks by bus or to take a boat down the River Dee, you will sure enjoy the delights of Chester.

Advances in generative artificial intelligence (AI) have enabled authentic-sounding speech synthesis (语音合成) to the point that a person can no longer distinguish whether they are talking to another human or a deepfake (深度伪造). If a person's own voice is "cloned" by a third party without their agreement, bad guys can use it to send any message they want.

Computer scientist and engineer Ning Zhang has developed a new method to prevent unauthorized speech synthesis before it takes place: a tool called AntiFake.

Traditional deepfake detection methods only work after the damage is done. However, AntiFake prevents voice data from being synthesized into an audio deepfake beforehand. This tool turns the tables on cybercriminals (网络罪犯) by using similar voice cloning techniques they employ, but for voice protection. The software complicates voice data extraction and feature identification crucial for voice synthesis. "We're using an opposite AI technique originally used by cybercriminals, but now we're using it against them," Zhang explained. "We slightly change the recorded audio, just enough to make it unusable for voice clone training while still sounding natural to humans."

Ben Zhao, a professor of computer science at University of Chicago, says that the software, like all digital security systems, will never provide complete protection. But, he adds that it can raise the bar and limit the attack to a smaller group of individuals with significant resources.

AntiFake can already protect shorter voice recordings against cloning. The creators of the tool believe that it could be extended to protect larger audio documents or music from misuse. But the methods and tools that are developed must be continuously adapted because cybercriminals will learn and grow with them.