Deserts are found where there is little rainfall or where rain for a whole year falls in only a few weeks' time. Ten inches of rain may be enough for many plants to survive if the rain is spread throughout the year. If it falls within one or two months and the rest of the year is dry, those plants may die and a desert may form.

    Sand begins as tiny pieces of rock that get smaller and smaller as wind and weather wear them down. Sand dunes (沙丘) are formed as winds move the sand across the desert. Bit by bit, the dunes grow over the years, always moving with the winds and changing the shape. Most of them are only a few feet tall, but they can grow to be several hundred feet high.

There is, however, much more to a desert than sand. In the deserts of the southwestern United States, cliffs (悬崖) and deep valleys were formed from thick mud that once lay under a sea more than millions of years ago. Over the centuries, the water dried up. Wind, sand, rain, heat and cold all wore away at the remaining rocks. The faces of the desert mountains are always changing –-very, very slowly —as these forces of nature continue to work on the rock.

    Most deserts have a surprising variety of life. There are plants, animals and insects that have adapted to life in the desert. During the heat of the day a visitor may see very few signs of living things, but as the air begins to cool in the evening, the desert comes to life. As the sun begins to rise again in the sky, the desert once again becomes quiet and lonely.

    I used to think education was the most important thing in my life. Recently my attitude has begun to change, although I still hold that it is essential for everyone in the world today. As a top junior student in my college, I was asked to make a speech on how to learn English well. Standing in front of the audience and facing so many freshmen, I was trembling. I didn't remember any word that I had prepared. I ran out of the conference room without finishing my speech, leaving everyone puzzled. I cried that night in my room, feeling that I was a loser. Studying takes up so much of my time that I feel unable to really develop myself. I am just storing knowledge, yet I fail to communicate with others. I have received many awards in school, but they don't necessarily reflect anything about me. I don't know how to socialize. When I leave school I fear I will be of no use to society.

    I realize that everyone has his own way of living. I want to change my lifestyle. Of course I will keep studying. Yet I plan to look for a part-time job, which might turn out to be a good chance to get to know society. I still believe that working my hardest makes me happy. I will still stay on in college. But I will not allow it to shelter me from the real world.

    People have used pigeons to carry messages to one another for hundreds of years. In fact, pigeons were a common way to send messages right up through Would War II.

    In 1815, English troops were fighting Napoleon's forces in France, and the English were believed to be losing. A financial panic swept over London. Government bonds（债券）were offered at low prices. Few people noticed that Nathan Rothschild, an English banker, was snapping up these bonds when everyone else was trying to sell them. A few days later, London learned the truth: the Duke of Wellington had defeated Napoleon at the battle of Waterloo. The value of the bonds soared（暴涨）, and Rothschild became wealthy…all because his pigeons had brought him news of the victory before anyone else knew of it.

    Carrier pigeons were used by countries in both World War I and World War II. Not only were the birds often the fastest, most reliable way to send messages, they could also be used to reach soldiers far behind enemy lines, where radios and field telephone lines were useless. Since they could easily be released from airplanes or ships, every branch of the armed services used the birds.

    Carrying messages could be a dangerous job. Some pigeons performed with such bravery that they became famous and were even awarded medals. The most famous pigeon of all may have been Cher Ami. Stationed in France during World War I, he carried twelve important messages for American forces. On his last mission, though wounded, he carried a message that saved the lives of 194 American soldiers. For his amazing service, he was awarded the French “Croix de Guerre.”

    Today, modern communication methods can carry information from one place to another hundreds of times faster than a pigeon could do it. However, few people would argue with the fact that carrier pigeons — especially those that served in the military — have earned their place in history.

    You may be surprised to learn that English gets 30 to 45 percent of its words from French. The reason goes back to the year 1066, when Norman forces invaded（入侵）what is now Britain. The Normans were from northern France and spoke French. During the Norman occupation, French became the language of England's rulers and wealthy class. This lasted for more than 300 years. Other people in England continued to speak English during this period.

    Over time, the two languages combined and shared words. Some researchers believe that about 10,000 French words eventually entered the English language. However, although English took many French words, their meanings have not always stayed the same. Sometimes the differences in meanings can be very important, and lead to funny or strange situations if the words are used in the wrong way.

    Take, for example, the French word college. In English, college can often be used in place of the word university, or sometimes as a school within a university. However, in French, college actually means “middle school”, or the level of schooling for students in grades five or six through eight.

    There are many other similar words in the two languages with completely different meanings. In English, the word chat is a verb which means “to talk casually”; but in French, the word chat is the word for an animal: a cat.

    If an English speaker says someone is jolly, that means they are cheerful or friendly. But in French, jolie means someone is good-looking or pleasant to look at. In any case, both are nice things to say to someone.

    The United States of America is mainly an English-speaking country. The majority of the population speak English as their native language. Besides, education, social activities, etc. are conducted in English. Across but for the most part, Americans speak one common language. This language is sometimes called American English.

    However, not everyone in the USA is a native speaker of English. Most immigrants (移民)are speakers of other languages. There are hundreds of communities around the USA where English is not the most commonly used languages. Chinese, Italian, German, Greek, Spanish and French are all spoken in various communities in the USA. Spanish is the second most commonly spoken language after English. It is widely spoken in New York and across the southern part of the country. For speakers of other languages, learning English is important, but teaching people to speak English as a second language was given little attention. Non-English speakers were expected to "pick up" the language by meeting with others in public. Recently, this has changed.

    Today, most large public schools and community colleges have ESL(English as a Second Language )programs; American English teachers feel that English students should learn the language the way they will use it. Therefore, ESL programs offer different English lessons to different students. Some programs teach students to communicate in English in public. Other programs teach the kind of English people who will need for their jobs. American ESL instructional methods do not lay emphasis on grammar or translation, but on the importance of communication. The goal is to get the English learners to learn by using the language.

A recent study by UK researchers has shed light on a phenomenon termed "plant blindness," which contributes to the widespread but mistaken belief that plants are perceived as less vibrant or alive compared to animals.

It was not established that plant blindness is an innate trait; instead, the root cause appears to be the significantly diminished interaction with the natural world in societies that have become highly urbanized. The research indicates that a decrease in prior exposure to plants leads to a cycle of inattention.

Urban cultures exhibit a well-documented incidence of plant blindness. Children are often observed to regard plants as less significant than animals, especially during their early years, and they have difficulty recognizing a diverse range of plant species. Both educators and students have reported varying levels of knowledge about plants, with primary school teachers lacking a background in science being particularly affected. In contrast, older individuals tend to possess greater plant knowledge, likely due to their increased participation in outdoor activities.

Thirty-five studies have concluded that the process of urbanization or modernization has had a negative impact on people's understanding of plants. The value of plant gathering has diminished due to an increased reliance on urban services and a cash-based economy. Additionally, the time available for outdoor activities has been curtailed by work and school commitments. These factors have also reduced family time, which in turn has adversely affected the oral transmission of plant knowledge to younger and older family members.

Stagg has suggested that rather than a cognitive impediment to the visual recognition of plants, individuals residing in highly industrialized nations suffer from a lack of attention to plants due to a reduction in relevant exposure.

To disrupt the cycle of plant inattention, Stagg emphasizes the importance of exposing people to diverse ecosystems and demonstrating the direct benefits of plants to humans, as opposed to the indirect benefits derived from their industrial use or advantages to distant, traditional communities. Engaging with edible and practical plants in local settings can be instrumental in this regard. The level of botanical knowledge among younger generations is directly linked to their perception of the usefulness of such knowledge in their lives.