Dr. Sasaki knew the first-night effect probably has something to do with how humans evolved.

    The puzzle was what benefit would be gained from it when performance might be affected the following day. She also knew from previous work conducted on birds and dolphins that these animals put half of their brains to sleep at a time so that they can rest while remaining alert enough to avoid predators (捕食者). This led her to wonder if people might be doing the same thing. To take a closer look, her team studied 35 healthy people as they slept in the unfamiliar environment of the university's Department of Psychological Sciences. The participants each slept in the department for two nights and were carefully monitored with techniques that looked at the activity of their brains. Dr. Sasaki found, as expected, the participants slept less well on their first night than they did on their second, taking more than twice as long to fall asleep and sleeping less overall. During deep sleep, the participants' brains behaved in a similar manner seen in birds and dolphins. On the first night only, the left hemispheres (半球) of their brains did not sleep nearly as deeply as their right hemispheres did.

    Curious if the left hemispheres were indeed remaining awake to process information detected in the surrounding environment, Dr. Sasaki re-ran the experiment while presenting the sleeping participants with a mix of regularly timed beeps (蜂鸣声) of the same tone and irregular beeps of a different tone during the night. She worked out that, if the left hemisphere was staying alert to keep guard in a strange environment, then it would react to the irregular beeps by stirring people from sleep and would ignore the regularly timed ones. This is precisely what she found.

    In the movie Alice in Wonderland, Alice comes across a Cheshire cat and asks the cat which road she should take. The cat responds, “Well, that depends on where you're trying to get to.” Alice replies, “I don't know.” The cat responds, “Then any road will do.”

    You see, knowing where you're going increases your chances dramatically of getting there, and there is no better way of “GETTING THERE” than setting your goals for the upcoming year. Think of your goals as destinations and the action steps as your GPS guiding and directing you. If you are like many other people, for years you have resisted the need to set goals and even laughed at the thought that setting goals and，even more importantly, committing them to writing have positive effects on your life. However, a closer look might convince you that setting goals is a sensible thing to do.

    In 1979, a class of Harvard MBA students was asked: Have you set clear, written goals for your future and made an action plan to accomplish them? The following will astonish you. Only 3 percent of the class had written goals and a plan in place, 13% just had goals, and an amazing 84% had no specific goals at all.

    Ten years later the numbers of the class were interviewed once again and the following results will no doubt give the reason for our setting goals. The findings were that the 13% who had goals were earning, on average, twice as much as the 84% who had no goals at all. And the 3 percent who had clear, written goals with a plan to achieve them were achieving ten times as much as the entire 97% combined.

    Goal setting will increase your chances of arriving successfully at your destination. Remember, always set SMART goals. Goals should be: Specific, Measurable, Attainable, Relevant, and Time-bound!

    Young people can have problems with their minds. Some students become worried because they have to study very hard. Others have trouble getting on well with people like their parents and classmates.

    Li Wen, a junior 2student from No.2Middle School, could not understand his teacher and was doing badly in his lessons. He became so worried about it that he started to cut his finger with a knife. Another student16yearold Yang Fang from No.1Middle School, was afraid of exams. She got very worried in one and when she looked at the exam paper, she couldn't think of anything to write.

    A recent report from Jiefang Daily says about 18% of Shanghai teenagers have mental problems. Their troubles include being worried and very unhappy and having problems in learning and getting on with people. Many students who have problems won't go for advice or help. Some think they will look stupid if they go to see a doctor. Others don't want to talk about their secrets Liang Yuezhu, an expert on teenagers from Beijing Anding Hospital has the following advice for teenagers：

    Talk to your parents or teachers often.

    Take part in group activities and play sports.

    Go to see a doctor if you feel unhappy or unwell.

    Skeptics are a strange lot. Some of them refuse to admit the serious threat of human activities to the environment, and they are tired of people who disagree with them. Those people, say skeptics, spread nothing but bad news about the environment. The "eco-guilt" brought on by the discouraging news about our planet gives rise to the popularity of skeptics as people search for more comforting worldviews.

    Perhaps that explain why a new book by Bjorn Lomborg received so much publicity. That book, The Skeptical Environmentalist, declares that it measures the "real state of the world" as fine. Of course, another explanation is the deep pockets some big businesses with special interests. Indeed, Mr. Lomborg's views are similar to those of some Industry-funded organizations, which start huge activities though the media to confuse the public about issues like global warming.

    So it was strange to see Mr. Lomborg's book go largely unchallenged in the media though his beliefs were contrary to most scientific opinions. One national newspaper in Canada ran a number of articles and reviews full of words of praise, even with the conclusion that "After Lomborg, the environmental movement will begin to die down."

    Such one-sided views should have immediately been challenged. But only a different review appeared in Nature, a respected science magazine with specific readership. The review remarked that Mr. Lomborg's "preference for unexamined materials is incredible (不可信的)".

    A critical (批判的) eye is valuable, and the media should present information in such a way that could allow people to make informed decisions. Unfortunately, that is often inaccessible as blocked by the desire to be shocking or to defend some special interests. People might become half-blind before a world partially exhibited by the media. That's a shame, because matters concerning the health of the planet are far too important to be treated lightly.

    In order to learn a foreign language well, four things are necessary. First, we must understand the language when we hear it spoken. Secondly, we must be able to speak it ourselves, with confidence and without hesitation(犹豫). Thirdly, we must do much reading. Finally, we must be able to write it. We must be able to make sentences that are correct in grammar.

    There are no shortcuts to success in language learning. A good memory is a great help, but it is not enough only to memorize the rules from a grammar book. It is not much learning by heart long lists of words and their meanings, studying the dictionary and so on. We must learn by using the language.

    If we are pleased with a few rules we have memorized, we are not really learning the language. We must "learn through use." Practice is important. We must practise speaking and writing the language whenever we can.

China on Tuesday launched (发射) the Shenzhou-16 manned spaceship, sending three astronauts to its space station combination for a five-month mission. The spaceship, atop a Long March-2F carrier rocket, was launched from the Jiuquan Satellite Launch Center in northwest China at 9:31 a. m. (Beijing Time), according to the China Manned Space Agency (CMSA).

About 10 minutes after the launch, Shenzhou-16 separated from the rocket and entered its designated orbit (轨道). The three astronauts are in good shape and the launch is a complete success, the CMSA declared.

The Shenzhou-16 astronauts will conduct a great many in-orbit tests and experiments in various fields as planned. They are expected to make high-level scientific achievements in the study of novel quantum phenomenon (新奇量子现象), high-precision space time-frequency systems and the origin of life.

Jing Haipeng, Zhu Yangzhu and Gui Haichao will see the dockings of the Tianzhou-5 cargo craft and the Shenzhou-17 manned spaceship, as well as the departures of the Shenzhou-15 manned spaceship and Tianzhou-5.

It is the first manned task for the application and development stage of China's-space station, and the 29^th flight since the country's manned space program was approved (批准). The launch also marks the 475^th flight of the Long March carrier rocket series.