We are all called upon to make a speech at some point in life, but most of us don't do a very good job. This article gives some suggestions on how to give an effective speech.

    So, you have to give a speech and you are terrified. You get nervous, you forget what you want to say, you stumble over words, you talk too long, and you bore your audience. Later you think, “Thank Goodness, it's over. I'm just not good at public speaking. I hope I never have to do that again.”

    Cheep up! It doesn't have to be that bad. Here are some simple steps to take the pain out of speech making. Ask yourself the purpose of your speech. What is the occasion? Why are you speaking? Then, gather as many facts as you can on your subject. Spend plenty of your time doing your research. Then spend plenty of your time organizing your material so that your speech is clear and easy to follow. Use as many examples as possible, and use pictures, charts, and graphs if they help you make your points more clearly. Never forget your audience. Don't talk over their heads, and don't talk down to them. Treat your audience with respect. They will appreciate your thoughtfulness.

    Just remember: Be prepared. Know your subject, your audience, and the occasion. Be brief. Say what you have to say and then stop. And be yourself. Let your personality come through so that you make person-to-person contact with your audience.

    If you follow these simple steps, you will see that you don't have to be afraid of public speaking. In fact, you may find the experience so enjoyable that you volunteer to make more speeches! You're not convinced yet? Give it a try and see what happens.

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    It may sound strange, but cutting down a real tree for Christmas is actually greener than going with the artificial kind, one scientist says.

    “It is a little confusing to people,” said Clint Springer, a biologist at Saint Joseph's University in Philadelphia. Because of concerns over deforestation（砍伐森林）around the world, many people naturally worry that buying a real tree might contribute to that problem. But most Christmas trees for sale these days are grown not in the forest but on tree farms for the purpose of being cut.

    Moreover, from the viewpoint of greenhouse gases, real trees are “the obvious choice”. Live trees actively release oxygen as they grow, and meanwhile remove carbon dioxide from the atmosphere. After they have been cut and Christmas is over, they're usually cut into smaller pieces for mulch（覆盖物）. As mulch, the bits of trees very slowly release carbon dioxide back into the atmosphere. So in the end, a real Christmas tree is carbon neutral, putting the same amount of carbon dioxide back into the air as it took out (although much more slowly).

    The tree farms that grow the trees also replant after the trees are cut.  Artificial trees, on the other hand, don't come out even in the carbon balance. Petroleum（石油）is used to make the plastics in artificial trees and lots of carbon dioxide-creating energy is required to make and transport them. Because these trees just end up in the places where waste is buried under the ground after use, “those greenhouse gases are lost forever,” Springer said.

Washington, D.C. Bicycle Tours

    Cherry Blossom Bike Tour in Washington, D.C.

    Duration: 3 hours

    This small group bike tour is a fantastic way to see the world-famous cherry trees with beautiful flowers of Washington, D.C. Your guide will provide a history lesson about the trees and the famous monuments where they blossom. Reserve your spot before availability—and the cherry blossoms—disappear!

    Washington Capital Monuments Bicycle Tour

    Duration: 3 hours (4 miles)

    Join a guided bike tour and view some of the most popular monuments in Washington, D.C. Explore the monuments and memorials on the National Mall as your guide shares unique facts and history at each stop. Guided tour includes bike, helmet, cookies and bottled water.

    Capital City Bike Tour in Washington, D.C.

    Duration: 3 hours

    Morning or Afternoon, this bike tour is the perfect tour for D.C. newcomers and locals looking to experience Washington, D.C. in a healthy way with minimum effort. Knowledgeable guides will entertain you with the most interesting stories about Presidents, Congress, memorials, and parks. Comfortable bikes and a smooth tour route (路线) make cycling between the sites fun and relaxing.

    Washington Capital Sites at Night Bicycle Tour

    Duration: 3 hours (7 miles)

    Join a small group bike tour for an evening of exploration in the heart of Washington, D.C. Get up close to the monuments and memorials as you bike the sites of Capitol Hill and the National Mall. Frequent stops are made for photo taking as your guide offers unique facts and history. Tour includes bike, helmet, and bottled water. All riders are equipped with reflective vests and safety lights.

    2.26-meter-tall Yao Ming made his NBA debut (初次登台) on October 23, 2002 and got 6 points for the Houston Rockets in the game. The next day, he got 13 points in another game.

    Most people think that Yao Ming is a born basketball player. But Yao said, "When you watch it on TV, it looks very easy. But when you are playing in the NBA, it is really not so easy." He said that joining the Houston Rockets was a new start and a new challenge. "I hope that through very hard work I can make everyone happy and help the Rockets win more games," he said. Yao Ming speaks some English. Both he and his teammates can understand each other. They don't think there is a language problem. While Yao Ming faces this new challenge, the people of Houston have shown great interest in him and they hope Yao Ming will bring new energy to the Rockets. The team has started having lessons to learn more about China, and many people who work for the Rockets have learned to speak some Chinese.

World Book Day, also known as World Book and Copyright Day, is an annual event organized by the UNESCO to promote reading, publishing and copyright. The first World Book Day was celebrated in Spain on April 23 in 1995. Let's take a look at the world's fascinating libraries and enjoy the fun of reading.

Royal Portuguese Cabinet of Reading

Located in the center of Rio de Janeiro, Brazil, the Royal Portuguese Cabinet of Reading is a library and cultural institution. It was built in the late 19th century under the stewardship of an association of Portuguese migrants. Open to the public since 1900, the cabinet has the largest collection of Portuguese literature outside Portugal, holding more than 350,000 books.

Stuttgart City Library

Stuttgart City Library is a cube outside with a hollow design inside. The hollow part is connected with misplaced stairs to create a unique sense of space. Since its completion in 2011, it has become a local cultural card and a "instagrammable" place for many tourists in Germany .

Wormhole Library

Located in Haikou, South China's Hainan province, the symbolic and artistic Wormhole Library, completed in 2021, provides the public with an ideal spot for reading and resting. It has a reading space that can hold around 10,000 books and has a multifunctional audio-visual area, as well as leisure areas such as cafes, baby care rooms, a common room and a rooftop garden.

Where does the meat on our table come from? It usually comes from livestock like chickens and cows. But did you know that meat can also be made in a lab? US company JUST has announced that lab-grown meat could be on some restaurant menus in the United States and Asia by the end of 2018, The Independent reported. 

"These meats include chicken nuggets (鸡块), sausage and foie gras (鹅肝酱), " Josh Tetrick, CEO of JUST, told The Independent. Lab meat is sometimes referred to as "clean meat". It is made using the stem cells (干细胞) of living livestock. The cells need to be grown in a lab for a few weeks. For example, making a hamburger patty (肉饼) takes about nine weeks, CNN reported. This is faster than raising a cow, which usually takes over 20 weeks. 

The first clean meat was a beef burger that was produced in 2013, but it was said to taste quite dry. How does clean meat taste now? Clean meat supporters told CNN that they think it tastes just like traditional meat. 

Clean meat has other advantages. It is healthier than traditional meat. Meat producers can control what type of fat goes into the meat. They can produce clean meat that contains healthy fats, such as omega-3 fatty acids (脂肪酸). This kind of fat is good for people's hearts. 

Clean meat can also help to solve global warming. According to The Washington Post, about 14. 5 percent of the planet's greenhouse gas emissions (排放) come from raising livestock. That's more than the emissions from every car, train, ship and airplane in the world combined. It is predicted that switching to clean meat could lower greenhouse gas emissions by 96 percent, The Independent reported.