It is bad to have food stuck between your teeth for long periods of time. This is because food attracts germs; germs produce acid, and acid hurts your teeth and gums. Flossing (使用牙线) helps to remove the food that gets stuck between your teeth. This explains why flossing helps to keep your mouth healthy, but some doctors say that flossing can also be good for your heart.

    It may seem strange that something you do for your teeth can have any effect on your heart. Doctors have come up with a few ideas about how flossing works to keep your heart healthy. One idea is that the germs that hurt your teeth can leave the mouth and travel into your blood.Germs that get into the blood can then attack your heart. Another idea is based on the fact that when there are too many germs in your mouth, the body tries to fight against there germs. For some reason, the way the body fights these mouth germs may end up weakening the heart overtime.

    Not every doctor agrees about these ideas. Some doctors think that the link between good flossing habits and good heart health is only a coincidence. The incidence (发生率) of two or more events is completely random, as they do not admit of any reliable cause and effect relationship between them. For example, every time I wash my car, it rains. This does not mean that when I wash my car, I somehow change the weather. This is only a coincidence. Similarly, some doctors think that people who have bad flossing habits just happen to also have heart problems, and people who have good flossing habits just happen to have healthy hearts.

    The theory that flossing your teeth helps to keep your heart healthy might not be true. But every doctor agrees that flossing is a great way to keep your teeth healthy. So even if flossing does not help your heart, it is true to help your teeth. This is enough of a reason for everyone to floss their teeth every day.

    Our spiritual intelligence quotient(精神智商), or SQ, helps us understand ourselves, and live fuller, happier lives.

    Though we're all born with SQ, most of us don't even realize that we have it. Fortunately, you don't have to sign up for classes to learn how to improve your SQ. Here are some simple steps that can lead you to this new level of understanding.

    Sit Quietly. The process of developing spiritual intelligence begins with solitude(独处) and silence. To tune in to your spirit, you have to turn down the volume(强度) in your busy, noisy, complicated life and force yourself to do nothing at all. Start small by creating islands for silence in your day. In the car, instead of listening to the music, use the time to think. At work, shut the door to your office between meetings, take a few breaths and let them out very, very slowly. Enjoy the stillness in your home after the kids are finally in bed.

    Step Outside. For many people, nature sets their spirit free. Go outside to watch a beautiful sunset. If you are walking with the dog, take the time to admire flowers in bloom; follow the flight of a bird and watch clouds float overhead.

    Ask Questions of Yourself. Ask open-ended questions, such as ‘What am I Feeling? What are my choices? Where am I heading?'

    But don't expect an answer to arrive through some supernatural forms of e-mail. ‘Rarely do I get an immediate answer to my question,' says Reverend Joan Carter, a Presbyterian minister in Sausalito, California. ‘But later that day I suddenly find myself thinking about a problem in a perspective(角度) I never considered before.'

    Trust Your Spirit. While most of us rely on gut(本能的) feeling to realize danger, spiritual intelligence pushes us, not away from, but towards some action that will lead to a greater good.

    When you were at school, the last thing you probably wanted to do was spend your weekends going to work. There was homework to do, sport to play and fun to have. But our parents probably persuaded us to find a job to earn some money and get some life experience. When I was a teenager I had a paper round: delivering newspapers to people's homes. I then progressed to a Saturday job in a supermarket: stacking shelves and working at the checkout.

    Today in the UK you are allowed to work from the age of 13, and many children do take up part-time jobs. It's one of those things that are seen almost as a rite of passage (成人仪式). It's a taste of independence and sometimes a useful thing to put on your CV (简历). Teenagers agree that it teaches valuable lessons about working with adults and also about managing their money.

    Some research has shown that not taking up a Saturday or holiday job could be deleterious to a person later on. A 2015 study by the UK Commission on Employment and Skills found that not participating in part-time work at school age had been blamed by employer's organizations for young adults being ill-prepared for full-time employment, but despite this, recent statistics have shown that the number of schoolchildren in the UK with a part-time job has fallen by a fifth in the past five years.

    So, does this mean that British teenagers are now afraid of hard work? Probably not. Some experts feel that young people feel going out to work will affect their performance at school, and they are under more pressure now to study hard and get good exam results-and a good job in the long term. However, Geoff Barton, general secretary of the Association of School and College Leaders, told BBC News that “Properly regulated (控制的) part-time work is a good way of helping young people learn skills that they will need in their working lives." In reality, it's all about getting the right balance between doing part-time work and having enough time to study and rest.

    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.

    The best movies for teenagers are listed here. You can pick one for your teen to watch it with you or their best friends.

    ⒈Eighth Grade

    Kayla is a shy, socially anxious girl trying to get by the last few weeks of middle school. She earns the "most quiet" girl title in school, but at home, she posts online self-help and motivational videos that not many people watch. Kayla is raised by her single father Mark, who tries to disconnect Kayla from the social media.

    ⒉Dead Poets Society

    Mr. Keating, an English teacher, introduces his students, all set to become doctors and lawyers, to poetry and free-thinking. Each of his students deals with several issues. He encourages them to form the Dead Poets Society where they read and write poetry.

    ⒊The Hunger Games

    Based on a book by Suzanne Collins, the story is set in a country called Panem, which was once the ruins of North America. Every year, young boys and girls from the 12 districts of Panem fight in the Hunger Games, a televised competition in which the contestants (参赛者) compete against death.

    ⒋The Break fast Club

    It begins with five students at the Shermer High School, Claire, a princess, John a criminal, Andrew, an athlete, Brian, a bookworm and Allison, an unfortunate person, who are forced to spend 9 hours together on a Saturday. In spite of their differences, they find that their social problems are more similar than they think. The film tries to encourage breaking social boundaries for positive self-identification in the world.

When we learn to drive, we need to learn basic skills such as how to switch on the engine, turn on the wipers, operate the brakes, etc. before we actually take to the road. Once the lower order operations and skills listed above have been automatized or at least routinized to the extent that we do not have to pay attention to them (by­pass Working Memory's attentional systems), we can actually be safe in the assumption that we can wholly focus on the higher order skills which will allow us to take the split seconds decisions that will prevent us from getting lost, clash with other cars, break the traffic laws while dealing with our children messing about in the back seats.

This is what the brain does, too, when learning languages. Because Working Memory has a very limited space available when performing any task, the brain has learnt to automatize lower order skills so that, by being performed "subconsciously" they free up cognitive(认知)space. So, for instance, if I am an advanced speaker who has routinized accurate pronunciation, grammar and syntax to a fairly high degree, I will be able to devote more conscious attention (Working Memory space) to the message I want to put across. On the other hand, if I still struggle with pronunciation, word order, irregular verb forms and tenses most of my attention will be taken up by the mechanics of what I want to say, rather than the meaning; this will slow me down and limit my ability to think through what I want to say due to cognitive overload.

In language teaching this important principle translates as follows: in order to enable our students to focus on the higher order skills involved in comprehension and production we need to ensure that the lower­order ones have been acquired or performance will be reduced.