Do you and your friends ever talk about your dreams with each other? If you do, you might have noticed something interesting – some of your friends seldom remember their dreams, but some can always describe their dreams so clearly that it seems like they're describing things that really happened to them. What makes those people different?

    The answer is simple. There are two different types of dreamers – low dream recallers（回忆者）and high dream recallers.

    Low dream recallers usually remember their dreams only twice a month. But high dream recallers are able to remember them about five mornings a week. And a new study suggests that activity in a certain part of the brain could have something to do with it, reported The Huffington Post.

    Perrine Ruby, a French researcher at the Lyon Neuroscience Research Center, studied 41 people (21 high dream recallers and 20 low dream recallers) and recorded their brain activity.

    She found that a part of the brain called the temporo-parietal junction (颞顶联合区) was more active in high dream recallers than in low dream recallers – both when they were sleeping and awake.

    This brain area collects and processes（编程）information from the outside world. This means that high dream recallers know more about what's happening around them. For example, when they are awake, they respond (对……有反应) more strongly to hearing their own names, and when they are sleeping, they are woken more easily by sounds and movements.

    By closely studying people's brain activities, Ruby found that high dream recallers have twice as much “wakefulness time” during sleep as low dream recallers do. And it is during these short times of wakefulness that the brain remembers dreams.

    “The sleeping brain is not able to remember new information,” Ruby told The Washington Post. “It needs to wake up to be able to do that.”

    This is not hard to understand. Just try to think of your own sleeping experiences. If you are worried during the night, you are more likely to remember your dreams, but if you sleep well, you will remember little in the morning, and this is because “you never get a chance to remember”, Robert Stickgold, a Harvard Medical School researcher, told The Washington Post.

    Computers can injure you. Most other injuries happen suddenly. For example, if you fall off a bicycle and break your arm, it happens very quickly. But computer injuries happen slowly.

Your eyes

    Too much light can injure your eyes, so never sit too close to a computer screen. Your eyes should be at least 50 centimeters from the screen. Remember to look away from it sometimes. This gives your eyes a rest.

    When you use a computer, the window should be on your left or your right. If it is behind you, the light will reflect(反射) on the screen. If the windows is in front of you, the sun and the screen will both shine into your eyes.

Your hands and wrists(手腕)

    Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times. If you use a keyboard for a long times, follow these three rules:  1) Rest your wrists on something.  2) Keep your elbows at the same height as the keyboard.  3) Stop sometimes and exercise your hands, wrists and fingers in a different way.

Your back

    Some people sit for many hours in front of a computer. If you sit in a wrong way, you can injure your back or your neck. So you should sit with your back straight. The top part of the screen should be in front of your eyes. Your forearms(前臂), wrists and hands should all be parallel to(与......平衡) the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and neck.

    Enjoy your computer, but use it safely.

    Albert Einstein is right once again! He thought of the idea about gravitational waves years ago with his Theory of Relativity, but scientists are finally discovering that it really exists now. But what are gravitational waves, and why are they important?

    Well, gravitational waves are made by black holes and can change time in space. Black holes aren't holes but are lots of matter put together into a very small area. They are created when a star, much like our sun, explodes and leaves behind this dense* material. It doesn't shine like a star any more, and it becomes black.

    The black holes that made these waves are special. About 1.3 billion years ago, there were two black holes that kept moving closer and closer together. Finally, they hit each other and formed one big black hole. The energy is given off and created the ripples* in space. These ripples are gravitational waves. For example, imagine you throw a stone into a pool. It creates ripples that change the shape of the water. Well, that's kind of what the influence of one black hole hitting the other has in space.

    Gravitational waves are hard to explore. But thanks to the efforts of scientists, the ripples were discovered on Feb. 11th, which is the first time in human history. Einstein was excellent to know this 100 years ago before we have the technology. It can give us a new view of the universe we live in. The discovery of gravitational waves, unlike stars, galaxies and other bright objects, black holes don't produce light, so we can't see them by tools. Gravitational waves allow scientists to look at the universe not only with light, but also with gravity. "Everything else in astronomy like the eye," A scientist told The New York Times. "Finally, astronomy grew ears. We had never ears before."

    Now, we will be able to find black holes and things that are much further away from Earth, which means much more space exploration in the future. And who knows, this discovery could even lead to time travel!

A new study has suggested that the key to reducing feelings of anger is not venting (letting the angry emotions out) but doing calming activities such as yoga or meditation. 

The study was published in March by Sophie Kjaervik and Brad Bushman from Ohio State University in the US. They wanted to explore the popular theory that venting (expressing) anger is a good way of reducing it. Examples of venting anger include shouting or hitting something like a cushion, so that you let go of the emotion and therefore don't feel it any more. The pair looked at 154 other studies on anger. These involved 10, 189 people, and included a variety of ages and backgrounds. In their study, Kjaervik and Bushman define anger as "an emotional response (反应) to a real or imagined threat (威胁)". They used a theory of emotion (情绪假说) that says emotions are partly felt in your body and partly in your mind. 

The scientists looked at the other studies to see how different activities influenced anger. They found that activities such as running or boxing—which are often thought to be good for dealing with anger—weren't very good at reducing it. In fact, some of these activities actually made it worse because they increased physical responses in the body that are linked to feeling angry. For example, they made people's hearts beat faster. However, activities that decreased physical responses in the body did help to reduce feelings of anger. These included activities that slow the heart rate, such as deep breathing, meditation and yoga. Bushman says activities that increase physical responses may be good for heart health but are "definitely not the best way to reduce anger". 

The team found jogging was most likely to increase anger. However, some heart-rate increasing activities—like ball games and team sports—could reduce anger.

Red lanterns are very popular in China. The first Chinese paper lanterns {#blank#}1{#/blank#}（invent） during the Eastern Han Dynasty. In ancient China，people raised lanterns to get light and wish {#blank#}2{#/blank#} a better life. Also，lanterns were {#blank#}3{#/blank#} （ wide） used on festivals. Hanging red lanterns{#blank#}4{#/blank#} （become） a tradition during the festival now. 

The materials for making lanterns are simple. People can make bamboo，wood and metal into frames（框架） of lanterns. Paper and silk {#blank#}5{#/blank#} （be） the main materials for covers. The{#blank#}6{#/blank#}（tradition） lanterns are covered by red paper with a candle burning inside.{#blank#}7{#/blank#} most common Chinese lanterns are red，round and with red or golden tassels（流苏）. They are considered as bright symbols of happiness and good {#blank#}8{#/blank#}（wish）. 

People not only light colorful lanterns for the Chinese New Year，{#blank#}9{#/blank#} also enjoy lantern shows during the Lantern Festival. It is young people's duty{#blank#}10{#/blank#}（spread） the culture of lanterns to the world. 

I often hear some students say English is difficult, and they can't learn1 well. But English is very easy for me. I'm good at it, and I'm very 2 to tell you something about how I study English.

First, I think an interest in English is very important. When I began to learn English, my teacher often taught us 3 an active way. It made me become interested in it. I worked hard at it and often got very good marks. The harder I did in it, the4 I learned it. As a result, I could do better and better in it.

Second, you'd better have good5 to learn it, such as listening to the teacher carefully, speaking bravely and reading aloud every day.6 , you should practice again and again. I also have a good habit. That is whenever I have a problem, I will ask my teacher for help. It really7 me a lot.

Besides, I often read stories, jokes and easy novels in English. From them I learn 8 is not only interesting, but also useful. Reading helps me to review what I have learned and improve my English a lot. So I think doing more9 is an important way to learn English well.

Of course, if you want to get good10 in an exam, it's necessary for you to do some exercises. I hope my ways can help you.