Camping is a good way to spend time along with your kids and to show them how wonderful nature can be. Through camping, children can discover new things about nature, such as flowers, birds, and other small animals. Camping gives kids time to get away from all the electronics (电子) of today's culture. So it is necessary to plan exciting and enjoyable family camping trips with your children while they are young.

    When planning your family camping trip, consider the activities your kids like: games, hiking, swimming, boating, bicycling, etc. Select a camping place that has some of the activities the kids are interested in. Meal planning is an important part of your camping trip. Plan the meals together, and kids love to choose what they want to eat.

    When starting to pack for your trip, let the kids pack their own items (物品) . Each person should have his/her own sleeping bag with a luggage (行李) bag to put it in. Personal items should be packed with their sleeping bags. Encourage the kids to put their items in a certain place and always return it when they have finished using it.

    When you have arrived at your campsite, make all the camping activities a family activity, which will help children to realize how important team-work is. Everyone can have his/her own job sitting up the campsite. Meal time can be a fun time. So let the older ones help with the cooking on your outdoor camping stove while the younger ones get the picnic table ready.

    In his research work, Philosophical Investigations（哲学调查）, Ludwig Wittgenstein tries to clarify（澄清）some of the problems in people's thinking about how the mind works.

    Imagine, he says, that everyone has a small box in which they keep a beetle（甲壳虫）. No one is allowed to look in anyone else's box, only in their own. Over time, people talk about what is in their boxes and the word “beetle” comes to stand for what is in everyone's box. Through this example, Wittgenstein point out that the beetle is very much like an individual's（个体的）mind; no one can know exactly what it is like to be another person or experience things from another's point of view—look in someone else's “box”—but it is general considered that the mental working of another person's mind is very similar to that of our own. However, it does not really matter—he argues—what is in the box or whether everyone indeed has a beetle, since there is no way of checking or comparing. In a sense, the word “beetle” simply means “what is in the box”. From this point of view, the mind is simply “what is in the box”, or rather “what is in your head”.

    Wittgenstein considers language to have meaning because of public usage. In other words, when we talk of having a mind—or a beetle—we are using a term that we have learned through conversation. The concept might be perceived（感知）differently in each of our minds, so the word “mind” cannot be used to refer specifically to some entity（本质）outside of our own conception（概念）, since we cannot see into other people's boxes.

    Karen Bystedt was born in Israel, but lived in London and California as a child. In 1982, as a photography (摄影) student at New York University, she was photographing male models for a book when she came across an ad featuring Andy Warhol, a very famous artist. She thought it would be really great to put him in her book.

    So she called Andy Warhol at his studio in Union Square and asked if she could photograph him.

Two weeks later, Bystedt took a rented Hasselblad camera and lights to Warhol's famed "Factory" on 14th street. She ended up taking 36 pictures, and published two in her book, Not Just Another Pretty Face, published in 1983. Warhol came to its launch (发行) party—and that was the last time she saw him.

    A few years later, she packed the portraits in a box and moved to Los Angeles. But after she'd gotten settled, she couldn't find them. She couldn't remember whether she had given the photos away or just left them in some forgotten storage unit. Either way, she thought they were lost forever.

    In 2011, Bystedt became determined to find the missing films(底片). She spent two weeks going through two old garages, where she had put a bunch of belongings decades before. In a cardboard box, she found ten of the original films, covered in dust. She and a friend spent four months digitizing and cleaning the images up, pixel(像素) by pixel.

    Bystedt was not content to merely publish the unseen photos. She invited contemporary artists to paint over and around her Warhol pictures, breathing new life into her old work. So she began reaching out to artists, seeing if they would be interested in putting their own stamp on the pictures.

    The responses was overwhelming. Bystedt's new exhibit, "The Lost Warhols," opened on May 1, 2018 at 178 Sixth Avenue in Soho, New York, included 66 different interpretations of her portraits from 34 artists.

    Tourist Guide To The National Gallery

    Opening hours: Daily 10am -6pm Friday 10amn-9pm

    Closed.24-26 December

    Reasons to visit

    With over 2, 300 paintings in the collection, there are hundreds of reasons to visit the Gallery

    Here are some to get you started……

    Get into great art. From Leonardo da Vinci to Vincent van Gogh. See priceless works of art for free……

    Get creative, Brush up your skills, and create your own great works of art……

    Lean about art. Discover more about paintings.

    Be inspired. Life, death, passion, beauty. Every painting tells a story.

    Relax. Escape from the noisy city into a painting

Regulations

    Talk in a low voice when you use your cellphone in the gallery.

    Not touching the paintings or other exhibits. Not taking pets in or crossing the barriers.

    Consuming food and drink in designated areas only, i. e. not in rooms that contain paintings

    Following our'no-smoking' policy in any part of the building.

    Following our'no –photography' policy in exhibitions where a sign is displayed

    Access:

    The National Gallery aims to make access to the paintings enjoyable and welcoming to the widest possible public. There are a range of facilities to help you see the collection, visit exhibitions and come to events

    The Gallery offers British Sign Language -interpreted As on paintings for visitors who are deaf, and special art sessions(展期)for visitors who can't see.

    Address: The National Gallery, Trafalgar Square, London WC2N SDN

    Getting here:

    By tube

    The nearest stations are Charing Cross( National Rail, Northern, and Bakerloo lines )and Leicester Square( Northern and Piccadilly lines)

    By bus

    Routes 3, 6, 9, 11, 13, 15, 23, 24, 87, 91, 139, and 176 stop at Trafalgar Square.

    By bike

    The nearest bike stands are on Orange Street, St Martin's Street, St Martins Place, and Duncannon Street

    Click here to find more information.

    When one tried to unify gravity with quantum mechanics (量子力学), one had to introduce the idea of 'imaginary' time. If one can go forward in imaginary time, one ought to be able to turn round and go backward. This means that there can be no important difference between the forward and backward directions of imaginary time. Yet there is a big difference between the forward and backward directions of 'real time' in ordinary life. Imagine a cup of water falling off a table and breaking into pieces on the floor. If you take a film of this, you can easily tell whether it is being run forward or backward. You can tell that the film is being run backward because this kind of behavior is never observed in ordinary life.

    The explanation that is usually given as to why we don't see broken cups gathering themselves together off the floor and jumping back onto the table is that it is forbidden by the second law of thermodynamics (热力学). This says that in any closed system disorder, or entropy (熵), always increases with time. In other words, it is a form of Murphy's law: things always tend to go wrong! An intact cup on the table is a state of high order, but a broken cup on the floor is a disordered state. One can go readily from the cup on the table in the past to the broken cup on the floor in the future, but not the other way round.

    The increase of disorder or entropy with time is one example of what is called an arrow of time, something that tells the past from the future, giving a direction to time. There are at least three different arrows of time. First, there is the thermodynamic arrow of time, the direction of time in which disorder or entropy increases. Then, there is the psychological arrow of time. This is the direction in which we feel time passes, the direction in which we remember the past but not the future. Finally, there is the cosmological arrow of time. This is the direction of time in which the universe is expanding rather than contracting.

    Everyone likes living in a clean and comforting environment. If the environment are bad, it will affect our body, and make us not feel well. Sometimes we may be terribly ill. At that time we don't want to work, and we have to stay in bed and rest at home. So the environment is very important to us.

    It's germs that makes us ill. There are germs everywhere, They are very small and you can't find them with your own eyes, but you can see them with a microscope They are very small and there may be hundreds of them on a very small thing, Germs can always be found in dirty water. When we look at dirty water under the microscope, we shall see them in it. Germs can also be found in air and dust. If you cut your finger, some of the dust from the floor may go into it, and you will have much pain in it. Sometimes the germs will go into all of your body, and you will have pain everywhere.

    To keep us healthy, we should try our best to make our environment become cleaner and tidier. This needs us to act together.