Energy independence. It has a nice ring to it. Doesn't it? If you think so, you're not alone, because energy independence has been the dream of American president for decades, and never more so than in the past few years, when the most recent oil price shock has been partly responsible for kicking off the great recession.

    “Energy independence” and its rhetorical (修辞的) companion “energy security” are, however, slippery concepts that are rarely though through. What is it we want independence from, exactly?

    Most people would probably say that they want to be independent from imported oil. But there are reasons that we buy all that oil from elsewhere.

    The first reason is that we need it to keep our economy running. Yes, there is a trickle（涓涓细流）of biofuel available, and more may become available, but most biofuels cause economic waste and environmental destruction.

    Second, Americans have basically decided that they don't really want to produce all their own oil. They value the environmental quality they preserve over their oil imports from abroad. Vast areas of the United States are off-limits(禁止) to oil exploration and production in the name of environmental protection. To what extent are Americans really willing to endure the environmental impacts of domestic energy production in order to cut back imports?

    Third, there are benefits to trade. It allows for economic efficiency, and when we buy things from places that have lower production costs than we do, we benefit. And although you don't read about this much, the United States is also a large exporter of oil products, selling about 2 million barrels of petroleum products per day to about 90 countries.

    There is no question that the United States imports a great deal of energy and, in fact, relies on that steady flow to maintain its economy. When that flow is interrupted, we feel the pain in short supplies and higher prices, At the same time, we derive(得到，获得) massive economic benefits when we buy the most affordable energy on the world market and when we engage in energy trade around the world.

    When her five daughters were young, Helene An always told them that there was strength in unity (团结). To show this, she held up one chopstick, representing oneperson. Then she easily broke it into two pieces. Next, she tied several chopsticks together, representing a family. She showed the girls it was hard to break the tied chopsticks. This lesson about family unity stayed with the daughters as they grew up.

    Helene An and her family own a large restaurant business in California. However, when Helene and her husband Danny left their home in Vietnam in 1975, they didn't have much money. They moved their family to San Francisco. There they joined Danny's mother, Diana, who owned a small Italian sandwich shop. Soon afterwards, Helene and Diana changed the sandwich shop into a small Vietnamese restaurant. The five daughters helped in the restaurant when they were young. However, Helene did not want her daughters to always work in the family business because she thought it was too hard.

    Eventually the girls all graduated from college and went away to work for themselves, but one by one, the daughters returned to work in the family business. They opened new restaurants in San Francisco and Los Angeles. Even though family members sometimes disagreed with each other, they worked together to make the business successful. Daughter Elisabeth explains, "Our mother taught us that to succeed we must have unity, and to have unity we must have peace. Without the strength of the family, there is no business."

    Their expanding business became a large corporation in 1996, with three generations of Ans working together. Now the Ans' corporation makes more than $20 million each year. Although they began with a small restaurant, they had big dreams, and they worked together. Now they are a big success.

    Food festivals around the world

    To a growing number of US students in China, study in the ancient country is no longer just a cultural experience it has become an important part of their future professional careers.

    Sam Gor, a 26-year-old student from Santa Clara, a county near San Francisco, said the purpose of his studies in Beijing was to help him find a good job when he goes back to the United States. "Culture matters," he said. "But more importantly, to learn Chinese and get a better understanding of the country may help me professionally." As a new student at Beijing Language and Culture University (BLCU), Gor hopes to find a job in Santa Clara's local government when he goes back home in one year. "I need to learn Chinese if I want the job, as we have a large Chinese community there."

    Gor is not alone in his thinking. While the number of US students in China has grown from less than 100 in the early 1980s to more than 10,000 for the time being. Many of them are here to boost(提高) a professional skill as much as to enjoy a new culture.

    “In the past, foreign students came to China simply for our culture,” said Xu Quihan, director of BLCU's foreign students' office. “But because of China's rapid economic and social development, being able to speak Chinese has become a useful tool to a student's future job”

    There are more US students who choose to stay in the country instead of going back after graduation. Stephanie Schubmehlo, a 23-year-old from Rochester, New York State, said she would like to stay in Beijing after graduation. “I love the city, and I can earn myself a living here if I can speak good Chinese,” she said, adding that some of the US students she knows shared the same idea.

    Learning Chinese could be one of the most important decisions you ever make. Chinese is becoming the language to learn in the 21^st century. With the world's largest population and a rapidly growing middle class, China stands to become the engine of the world's economy in the coming years. This will make learning Chinese very important for people in many industries, or for those of us who wish to visit China or learn from its culture and history.

    There is an ongoing effort to modernize the writing system and standardize the language. An increasing number of people learning Chinese are learning the Mandarin, so unless you absolutely need to learn another dialect (such as Cantonese), be sure you are studying Mandarin.

For native English speakers Chinese is one of the most difficult and most different languages to learn. The vocabulary is wholly unfamiliar and unlike anything we know. In addition, in the Chinese tone system, words are spoken in rising or falling tones, which help to distinguish between them. Furthermore, there is the Chinese writing system— a collection of thousands of individual ideograms (表意文字), or symbols, which represent a word or an idea. These ideograms have no phonetic value—that is to say, we can't tell how the word is pronounced by how it is written. There is a method to present written Chinese in a phonetic script called pinyin. If you are learning Chinese, you'll be working with this pinyin system, but the beauty of the traditional writing system shouldn't be passed up. All these factors make learning Chinese difficult for us. Yet, for a determined learner, there's always a way to overcome it.

    Many people, some even at a very young age, set the goal of graduating from college. One American woman in Texas waited a long time for her chance to reach that goal.

    The woman, 85-year-old Janet Fein, received her bachelor's degree (学士学位) from the University of Texas in December, 2018.

    Fein has had a full life. She raised five children and then had a career as a secretary (秘书) until she retired at age 77. But even then, she was not ready to take it easy and rest during a well-earned retirement. She decided to major in sociology (社会学).

    Fein grew up in the Bronx area of New York City. In high school, she just wanted to finish and get a job. After graduating early, at the age of 16, she went to work as a secretary.

    After getting married, she spent 18 years staying home with her children. She held several jobs throughout her life, including being a secretary at a Dallas hospital. That is the job she retired from in 2011. She received an associate degree (专科学位) in 1995. But she also wanted to earn a bachelor's degree. Fein took part in a state program that lets people who are 65 and older take free classes at public universities in Texas.

    She kept going to class even as her health condition worsened. During her studies, it became necessary for her to use a walker to get around and she needed oxygen (氧气) too. She also developed knee problems. So, Fein took online classes to finish the last part of her degree requirements.

    Renee Brown is one of Fein's care-givers. She says Fein has also inspired her. At 53, she plans to begin nursing school to further her career. Brown says Fein told her, "Renee, you can do it. If I can do it you also can do it, and you will feel so good about it. "