The first day of the month of May is known as May Day. It is the time of year when warmer weather begins. People celebrate the coming of summer with customs that are expressions of joy and hope after a long winter. Today, May Day activities have been moved to the May Day holiday on the first Monday of the month. It is a public holiday when families take advantage of the time off to visit some of the UK's many attractions, including parks, zoos, historic buildings, ancient towns and villages and beautiful countryside.

    May Day celebrations have their origins in the Roman festival of Flora, the goddess of fruit and flowers, which marked the beginning of summer. People would decorate their houses and villages with leaves and flowers they picked at daybreak in the belief that the vegetation spirits would bring good luck. In the very early morning, young girls went into the fields and washed their faces with dew (露水). They believed this made them very beautiful for the following year.

    May Day was an important day in the Middle Ages and was a favorite holiday of many English villages. People of the time used to cut down young trees and stick them in the ground in the village to mark the arrival of summer. This is the origin of the maypole (五月柱). People danced around them in celebration of the end of winter. Maypoles were once common all over England and were kept from one year to the next. The tallest maypole is said to have been put up in London on the Strand in 1661. It stood more than 143 feet high and was cut down in 1717, when it was used by Newton to support a new reflecting telescope (反射式望远镜) invented by Dutch scientist Huygens.

    Your glasses may someday replace your smartphone, and some New Yorkers are ready for the switch. Some in the city can't wait to try them on and use the maps and GPS that the futuristic eyewear is likely to include.

     “ I'd use it if I were hanging out with friends at 3 a. m. and going to the [bar and wanted to see what was open,” said Walter Choo, 40, of Fort Greene.

      The smartphone-like glasses will likely come out this year and cost between $250 and $600, the Times said, possibly including a variation of augmented(增强的) reality, a technology already available on smartphones and tablets (平板电脑) that overlays information onto the screen about one's surroundings. So, for example, if you were walking down a street, indicators would pop up showing you the nearest coffee shop or directions could be plotted out and come into view right on the sidewalk in front of you.

     “ As far as a mainstream consumer product, this just isn't something anybody needs,” said Sam Biddle, who writes for Gizmodo.com.  “ We're accustomed to having one thing in our pocket to do all these things,” he added, “and the average consumer isn't gonna be able to afford another device (装置) that's hundreds and hundreds of dollars.”

    9to5Google publisher Seth Weintraub, who has been reporting on the smartphone-like glasses since late last year, said he is confident that this type of wearable device will eventually be as common as smartphones.

     “It's just like smartphones 10 years ago,” Weintraub said. “A few people started getting emails on their phones, and people thought that was crazy. Same kind of thing. We see people bending their heads to look at their smartphones, and it's unnatural,” he said. “ There's gonna be improvements to that, and this a step there.”

    Prinker: Color Your Way

    Tattoos always look so cool, but actually getting one is quite a commitment. After all, apart from using expensive laser removal therapy, they stay on your skin forever.

    The Prinker is here to change the game. It is a device (设备) that lets you create or print any image or temporary tattoos within a matter of seconds. It is connected to your smartphone and you can select a bunch of preloaded tattoos available in the app.

    This device was exhibited at The International Consumer Electronics Show in Las Vegas this year. It is manufactured by a Korean startup company called “SketchOn”.

    You can sketch your ideas out on your skin with this portable device that is almost twice the size of a computer mouse. This is a nice way to support your team in the match by printing its logo or design onto your skin. You can also share your tattoo designs with others through the app. It is also a fun and creative toy for kids to play with.

    In order to print the design, all you need to do is select or draw a design on your mobile and then press and rub the base of the device against your skin and you are done. These designs and images are water resistant but can be washed off with soap water. The ink of the Prinker is non-toxic and is made only from certified cosmetic ingredients. Each cartridge (墨盒) contains enough ink for about 1,500 tattoos, or as J₊ R. Smith would call it, “a good start.”

    The Prinker is developed by a small team of five members. The company is planning to launch the device in China and then in the United States. The device is currently commercializing in Korea as a rental device. The agencies and organizations pay $150 for a day to use it in their events or marketing.

    The current version of Prinker is aimed towards business users (think festivals, carnivals, sports events, promotion campaigns). But the company is working on a home version, and hopes to have it available to buy before the end of 2018. SketchOn estimates the personal model will retail at $200. The company is currently seeking to partner with international agencies for distribution opportunities.

    Although Prinker is currently aimed towards novelty and creative purposes, its technologies could eventually be adapted for use by professional tattoo artists or medical professionals who provide tattoos for patients, such as after a breast cancer operation or skin graft.

    The New Caledonia Barrier Reef (新喀里多尼亚堡礁)is located in New Caledonia in the South Pacific, and is the second-longest coral reef in the world, after Australia's Great Barrier Reef. The New Caledonia Barrier reef surrounds Grand Terre, New Caledonia's largest island, as well as the Ile des Pins and several smaller islands, reaching a length of 1, 500 km. The reef encloses(围住) in a lake of 24, 000 square kilometers, which has an average depth of 25 meters. The reefs lie up to 30 kilometers from the shore, but extend almost 200 km to the Entrecasteaux reefs in the northwest. This northwestern extension encloses the Belep Islands. Several natural passages open out to the ocean. The Boulari passage(通道), which leads to Noumea, the capital and chief port of New Caledonia, is noted for the Amedee lighthouse.

    The reef has great species diversity with a high level of endemism(动植物的特有分布), and is home to endangered dugongs, a kind of sea animal, and is an important nesting site for Green Sea Turtle.

    Most of the reefs are generally thought to be in good health. Some of the eastern reefs have been damaged by wastewater from nickel mining(镍开采)on Grand Terre. The waste from mining, agriculture, and grazing(放牧) has affected reefs near river mouths, which has been worsened by the destruction of mangrove forests, which help to keep wastes. Some reefs have been buried under several meters of wastes.

    In January 2002, the French government proposed(提议) listing New Caledonia's reefs as a UNESCO World Heritage Site. UNESCO listed New Caledonia Barrier Reef on the World Heritage List on 7 July 2008.

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⒋Heinle's Newbury House Dictionary of American English

{#blank#}5{#/blank#}Use this online dictionary to find simple and clear definitions, as well as example sentences and idioms. You can also find different cultural facts.

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Las Vegas can offer a lot more than you expect. Here are the best guided tours to help visitors make the most of their Sin City getaway.

Big Bus Las Vegas—Open Top Night Tour

Admire the glittering lights downtown on this evening double-decker bus tour. Along the drive, you'll pass well-known buildings before hopping off to enjoy the free light shows on Fremont Street. Tour-takers praise the guides for their informative, friendly account.

Passengers can board the buses at the LINQ Promenade starting at 7 p.m. each evening.

Cowboy Trail Rides—Red Rock Canyon Sunset Horseback Ride

When you need a break from the city life, put on a cowboy hat and boots for a sunset trail ride through Red Rock Canyon. On the ride, you'll follow a guide through the picturesque desert landscape, watching for wildlife. Travelers warn that it can get chilly on the ride, so they advise wearing warm layers.

Trail Rides are offered Tuesday through Sunday.

Papillon Grand Canyon Helicopters—Grand Celebration Tour

Papillon Grand Canyon Helicopters' Grand Celebration tour offers bird's-eye views of sought-after sights, like Eagle Point and Lake Mead. The tour also includes a Champagne picnic. The pilots and staff earn praise for their friendliness and professionalism.

There are several daily departure options.

Secret Food Tours—Las Vegas Strip

Every day Secret Food Tours take groups of 10 participants to five-star restaurants on the Strip to sample a variety of cooking delights, including pizza, chocolates and lobster. During the walking tour, highly praised guides teach tourgoers about the city's food and culture. Travelers say the food on the tour is plentiful and tasty, but they warn that you'll be doing a lot of walking.

Tickets include all food tastings.