Even when you're extremely busy, you aren't using your time with 100% efficiency. There are gaps in everyone's schedule where they aren't doing anything important. Even if your schedule hasno gaps, there is probably lots of time where you aren't working as fast or as effectively as you possibly could.

    Why aren't you completely efficient? It's because time isn't thelimiting factor. If it were the limiting factor, people could work non-stop without breaks or any unproductive distractions. Instead, people, even those who are highly productive, need to take breaks, occasionally procrastinate(拖延) and slow downon tasks throughout the day.

    The real and most important limiting factor for productivity is your energy levels to pay attention. Energy levels limit your productivity because when you're tired, you can have ample time and still not get everything done. Your attention ability is also limited, because even if there are amillion things that need to be done, you can only focus on one or two at a time.

    You might not be able to insert another 4-5 hours into your schedule without making some sacrifices. But even extremely busy people can addan hour or two into their schedule without can celling anything. The reason it's hard to “find time” isn't a lack of time. It's because you don't have enough energy left to focus on something else that needs to fit into your day.

    I first suspected time wasn't the real problem during an extremely busy period in my life over a year ago. I was insanely busy, but at that time I still exercised regularly. I had daily-to-do lists with over twenty items, and I still found time to exercise. However, after a few weeks off, due to illness, stopped exercising. I was not busy by any standards, in fact, my schedule was incredibly light. Despite this free time, I found it hard to find time to exercise. It seemed to get pushed later and later into my schedule until it was gone. How can I explain this odd experience? I believe you haveknown it.

    Recordings of angry bees are enough to send big, tough African elephants running away, a new study says. Beehives (蜂窝)—either recorded or real—may even prevent elephants from damaging farmer's crops.

    In 2002, scientist Lucy King and her team found that elephants avoid certain trees with bees living in them. Today, Lucy wants to see if African honeybees might discourage elephants from eating crops. But before she asked farmer to go to the trouble of setting up beehives on their farms, she needed to find out if the bees would scare elephants away.

    Lucy found a wild beehive inside a tree in northern Kenya and set up a recorder. Then she threw a stone into the beehive, which burst into life. Lucy and her assistant hid in their car until the angry bees had calmed down. Next，Lucy searched out elephant families in Samburu National Reserve in northern Kenya and put a speaker in a tree close to each family.

    From a distance, Lucy switched on the pre-recorded sound of angry bees while at the same time recording the elephants with a video camera. Half the elephant groups left the area within ten seconds. Out of a total of 17 groups, only one group ignored the sound of the angry bees. Lucy reported that all the young elephants immediately ran to their mothers to hide under them. When Lucy played the sound of a waterfall (瀑布) instead of the angry bees to many of the same elephant families, the animals were undisturbed. Even after four minutes, most of the groups stayed in one place.

    Lucy is now studying whether the elephants will continue to avoid the sound of angry bees after hearing it several times. She hasn't tested enough groups yet to know, but her initial (最初的) results were promising enough to begin trials with farmers. She has now begun placing speakers in the fields to see if elephants are frightened away.

    Phillip Island is a small island and nature reserve off the coast of South Australia, about 140 km from Melbourne. On the island you can see koalas, kangaroos and the main attraction, the Penguin Parade（归巢）on Summerland Beach.

    As dusk was approaching, we made our way down to the beach, as did everyone else. On the beach was a stone grandstand, rather cold on the behind, so bring a coat or blanket to sit on. As it got darker, people talked less, keeping an eye out on the beach to see the arrival of that first penguin.

    Suddenly there was movement at the edge of the surf and all heads turned as one. There, standing by the edge of the water was the smallest penguin we had ever seen. He looked left, then right, as if he was considering crossing a busy road and then he ran quickly across to the sand dunes and the penguin holes.

    He must have been the scout(侦查员), because after him, there came groups of penguins, some consisted of two or three penguins, and some had about ten or fifteen, but they all made the same mad dash across the sand into the holes, as if they couldn't get there fast enough. The groups started to lessen and finally no more penguins emerged from the sea.

    We sat on the grandstand for a while, not talking, just feeling awed(敬畏的) at what we'd just seen. Neither of us had ever seen penguins in the wild before, only in zoos and it was an amazing feeling.

    You could see the penguins here every evening and morning, but they weren't in cages or in small pools. The sea was their playground and it is a sight we would definitely recommend to anyone.

    You weren't allowed to take flash photographs as it scared them. After the penguins had gone to their holes, you could walk along boardwalks and see them there. That's got to be worth a look.

    Sheffield

    Lincoln College of English

    Classes for foreign students at all levels.

    3 months, 6 months, 9 months and one year course.

    Open all year.

    Small class (at most 12 students).

    Library, language laboratory and listening center.

    Accommodation (住宿) with selected families.

    25 minutes from London.

    Course fees for English for one year are ￡ 1,380 with reduction for shorter periods of study.

    Researchers are often interested in how culture changes over time. All cultures go through periods of change and some cultures change faster than others. For example, in the past 10 years, Chinese culture has changed rapidly as western products have become popular. Other countries, such as France, have created rules to prevent their culture from changing too quickly.

    Even though cultures change at different paces, the causes of cultural change are quite similar around the world. One of these is technology and medicine. In the United States the invention and development of birth control pills and other measures helped parents to limit the size of their families. As a result, families grew smaller and parents could give more attention to fewer children.  On the other hand, new technology has also created emotional distance among families.

    Cultures also change when they come into contact with other cultures. Immigration, for example, often results in cultural change for both immigrants and the host culture. Immigrants often bring with them different ideas, food, music, language, and manners when they move to a new culture. In Canada, for example, the government has a policy of multiculturalism where immigrants are encouraged to share their background cultures with Canadians while adopting and accepting Canadian culture.

    Cultural change can occur due to larger events. For example, economic depression, war, and disaster can endanger societies, which must adapt to these challenges and events. Because of these changes in society, ideas and ways of life also affect the entire culture. For example, during World War II, many American men were sent far off to fight. Consequently, women were suddenly needed to work in the factories. As a result of this change, it is no longer culturally acceptable to believe that they should not have the right to work.

Learning a second language

    Some people learn a second language easily. Other people have trouble learning a new language. How can you help yourself learn a new language, such as English? There are several ways to make learning English a little easier and more interesting.

    The first step is to feel confident about learning English. If you believe that you can learn, you will learn. Be patient. You don't have to understand everything all at once. It is natural to make mistakes when you learn something new. We can learn from our mistakes.

    The second step is to practise your English. For example, write in a diary every day. You will get used to writing in English, and you will feel comfortable expressing your ideas in English. After several weeks, you will see that your writing is improving. Besides, you must speak English every day. You can practise with your classmates after class. You will all make mistakes, but gradually you will become comfortable communicating in English.

    The third step is to keep a record of your language learning. You can write this in your diary. After each class, think about what you did. Did you answer a question correctly? Did you understand anything the teacher explained? Perhaps the lesson was difficult, but you tried to understand it. Write these achievements (成就) in your diary.

    You must be active in learning English and believe that you can do it. It is important to practise every day and make a record of your achievements. You will enjoy learning English, and you will have more confidence in yourself.