Children start out as natural scientists, eager to look into the world around them. Helping them enjoy science can be easy; there's no need for a lot of scientific terms or expensive lab equipment. You only have to share your children's curiosity. Firstly, listen to their questions. I once visited a classroom of seven-year-olds to talk about science as a job. The children asked me “textbook questions” about schooling, salary and whether I liked my job. When I finished answering, we sat facing one another in silence. Finally I said, “Now that we're finished with your lists, do you have questions of your own about science?”

    After a long pause, a boy raised his hand, “Have you ever seen a grasshopper （蚱蜢）eat? When I try eating leaves like that, I get a stomachache. Why?”

    This began a set of questions that lasted nearly two hours.

    Secondly, give them time to think. Studies over the past 30 years have shown that, after asking a question, adults typically wait only one second or less for an answer, no time for a child to think. When adults increase their “wait time” to three seconds or more, children give more logical, complete and creative answers.

    Thirdly, watch your language. Once you have a child involved in a science discussion, don't jump in with “That's right” or “Very good”. These words work well when it comes to encouraging good behavior. But in talking about science, quick praise can signal that discussion is over. Instead, keep things going by saying “That's interesting” or “I'd never thought of it that way before”, or coming up with more questions or ideas.

    Never push a child to “Think”. It doesn't make sense, children are always thinking, without your telling them to. What's more, this can turn a conversation into a performance. The child will try to find the answer you want, in as few words as possible, so that he will be a smaller target for your disagreement.

    Lastly, show; don't tell. Real-life impressions of nature are far more impressive than any lesson children can learn from a book or a television program. Let children look at their fingertips through a magnifying glass（放大镜）, and they'll understand why you want them to wash before dinner. Rather than saying that water evaporates（蒸发）, set a pot of water to boil and let them watch the water level drop.

    In the past, people who graduated from college felt proud of their academic achievement and confident that their degree would help them find a good job.

     However, in the past four years the job market has changed dramatically. This year's college graduates are facing one of the worst job markets in years. For example, Ryan Stewart, a graduate of San Jose University, got a degree in religious studies, but no job prospects. He points out that many people already working are getting laid off and don't have jobs, so it's even harder for new college graduates to find jobs.

    Four years ago, the future looked bright for the class of 2013. There were many high-tech job opportunities. Graduates received many job offers, and they were able to get jobs with high salaries and benefits such as insurance and paid vacations. However, “Times have changed and it's a new market,” according to Cheryl Allmen- Vinnidge of the San Jose State Career Center.

    Allmen-Vinniage says students who do find jobs started preparing two years ago. They worked during summer vacations, they have had several internships（实习）, and they have majored in one of the few fields that are still hot, like chemical engineering, accounting, or nursing, where average starting salaries have actually increased over last year. Other popular fields (like information system management, computer science, and political science) have seen big reduction in starting salaries.

    Ryan Stewart (he had hoped to become a teacher) may just end up going back to school. “I'd like to teach college some day and that requires more schooling, which would be great in bad economy.” he said.

    In conclusion, these days, to some students a degree may not be a ticket to instant wealth. For now, they can only hope its value will increase over time.

    China officially informed the World Trade Organization on Tuesday that it will ban the import of 24 different types of solid waste by the end of this year as part of a campaign to deal with environmental pollution and protect people's health.

    In response to growing public concerns over the potential environmental and health danger caused by the increasing amounts of solid waste imported into the country for recycling and treatment, China passed a special law in 1995 to control imports of waste materials, such as plastics, slag from steelmaking, unsorted scrap paper and discarded textile materials.

    A year later, the country published a list for solid waste imports and began implementing a permit system to control the import volumes and types of waste imported.

    However, due to the lack of effective supervision(监管) and the failure of relevant departments to fulfill their duties, solid waste imports have not been effectively controlled.

    So far, China is the world's largest importer of solid waste. According to the Ministry of Environmental Protection, China imported 7.3 million metric tons of plastic waste worth $3.7 billion in 2016, accounting for 56 percent of global imports of solid waste.

    Correct recycling of solid waste materials is an important part of the global economy, and moderate imports of scrap plastic, scrap paper and scrap rubber products, such as vehicle tires, can to some extent, make up for China's shortage of various raw materials.

    However, the lack of supervision has resulted in the country's severe soil and environmental worsening.

    Given that China's continuing efforts to push for industrial transformation and upgrading have resulted in a noticeable decline in the demand for the materials recycled from solid waste imports. It is right for the country to restrict such imports for the sake of the environment and public health, and to better adapt to the changed industrial structure.

    When I started working, I couldn't understand why there were some people who seemed to succeed in anything they tried, while there were others who just couldn't manage to achieve anything. After a while, I became amazed at the biggest difference lying in setting and reviewing goals regularly.

    Then I saw an academic study done by Dr. David Kohl on goals:

    80% of Americans claim that they don't have goals.

    16% of them have goals, but they don't write them down.

    Only 3% actually have written goals, but they don't review them regularly.

    Only 1% has written goals and they review them regularly, and these are among the highest achievers in the US.

    You need to set goals, independent of whether you want to achieve more or less. Goals are not only about achieving more or wanting to take on more in life-a goal starts with a simple desire.

    What do you do with your desires and wants in life? You could both ignore them and leave them to fade away in your mind, or listen to yourself and start taking action to get what you want in life.

    On the one hand, you can wish for a miracle, try to put the least amount of effort in, hoping to get the most out, and do nothing. On the other hand, you can get clear on the steps you need to take and take them, slowly, one by one until you reach success in that area and you will live with new amazing results in your life.

    Setting goals is the essential part to achieving success in any area. It begins with a desire, and then a written goal, followed by the right attitude and action, and that is your formula for success. Keep reviewing your goals and watch how your vision turns into your reality.

    If you're planning on travelling, there are a few simple rules about how to make life easier both before and after your journey.

    First of all, always check and double­check departure (起程) time. It is amazing how few people really do this carefully. Once I arrived at the airport a few minutes after ten. My secretary had got the ticket for me and I thought she had said that the plane left at 10：50. When I arrived at the airport, the clerk at the departure desk told me that my flight was closed. Therefore, I had to wait three hours for the next one and missed an important meeting.

    The second rule is to remember that even in this age of credit cards, it is still important to have at least a little of the local currency (货币) with you when you arrive in a country. This can be necessary if you are flying to a place few tourists normally visit. Once I arrived at a place at midnight and the bank at the airport was closed. The only way to get to my hotel was by taxi and because I had no dollars, I offered to pay in pounds instead. "Listen! I only take real money!" the driver said angrily. Luckily I was able to borrow a few dollars from a clerk at the hotel, but it was embarrassing.

    The third and last rule is to find out as much as you can about the weather at your destination before you leave. I feel sorry for some of my workmates who travel in heavy suits and raincoats in May, when it is still fairly cool in London or Manchester, to places like Athens, Rome or Madrid, where it is already beginning to get quite warm during the day.

    Many of us don't pay much attention to the importance of eye care. It is said that if you take care of your body, then you can surely be healthy. That is why our eyes should be given a lot of care. Natural eye care should be put in a number one place.

    There are several causes leading to poor eyesight like having not enough food，genes(基因)and aging(老化). Televisions, computers and reading are also the causes of having poor eyesight. If you happen to work in front of the computer, it is best to take a break every once in a while. Something dirty can cause redness and they will make you feel uncomfortable. It is bad for your eyes, too. If this happens, the best way is to clean your eyes by using cold water. You must also try your best to protect your eyes from harmful things. For example, sunglasses are not just for fashion but they can also serve as a great way to protect your eyesight from UV rays.

    Eating healthy food will do good to your eyesight. Remember that vitamins A, C and E are good for eyes. Try to eat food groups that have these vitamins. And you should do eye exercises which can protect your eyesight, too. If a person exercises regularly(定期地)and eats the right kind of food, his eyes will stay in good condition for a long time.

    All above are natural ways of eye care that help us to keep healthy eyes. Being happy all the time can be helpful to a person's eyesight, too. In a word, eye care is very important，no matter how old a person is.