The streams are about 12 to 15 feet wide and 300 feet or more long, scientists said. "What we're dealing with is wet soil, thin layers of wet soil, not standing water," said Aifred  McEwen of the University of Arizona at Tueson! the principal scientist for the Mars Reconnaissance Orbiter's high-resolution imaging experiment,

     Because liquid water is essential to life, the findings could have major implications for the possibility of Martianlife, There searchers said further exploration is needed to determine whether microscopic life exists on the planet.

    The presence of liquid water could also make life easier for astronauts visiting or living on Mars. Watercould be used for drinking and for creating oxygen and rocket fuel. NASA's goal is to send humans there inthe 2030s.

    The evidence of flowing water consistslargely of dark, narrow streaks(条痕) on the surface that tend to appear and growd uring the warmest Martian months and fade the rest of the year.

    Mars is extremely cold even in summer,and the streaks are in places where the temperature is as low as minus 10 degrees Fahrenheit. But salt can lower the freezing point of water and melt ice.

    The source of the water is a mystery. Scientists noted it could be melting ice. It could be an underground a quifer, which is rock or sand that can hold water. It is possibly water vapor from the thin Martian atmosphere, Or it may be a combination Michael Meyer, lead scientistfor NASA's Mars exploration program, said the only definitive way for now to determine whether there's life on Mars is to collect rocks and soil foranalysis on Earth - something a U.S. lander set for lift-off in 2020 will do.

How to Love Your Parents?

    You love your parents for the fact that they created you, raised you, and are in part, a source of who you are. {#blank#}1{#/blank#}.

    Respect them more and value these moments. You can use these moments to learn from them, preparing yourself for when you're off on your own. It's OK to get angry but angry actions don't help you or your parents. Act calmly, cool off, write down your feelings, or talk to a friend. {#blank#}2{#/blank#}.

    Obey their requests. It will make your attitude better and earn you more respect from them. It may seem like you are going through hell when you don't get what you want or you have to clean. However, you had better remember they keep a roof over your head when it's cold, raining, snowing, or too hot. Understand that parents are human beings and make mistakes. {#blank#}3{#/blank#} Since you can forgive (原谅) your friends, why not forgive your parents?

    Keep company with them. Do things with your parents like watching TV, or going somewhere with them. {#blank#}4{#/blank#} Listen to their old stories and learn from them. You will find they are your teachers in this way or another.

    Tell them you love them every morning.

    A gentle “good morning” and “I love you” will warm a coldest heart. {#blank#}5{#/blank#} Without your parents, you cannot come to this world.

A. Forgiveness is the key.

B. Here are some ways to love your parents.

C. Parents will in turn express their love to you.

D. After this, share your feeling with your parents.

E. Anyway, spend as much time with them as you can.

F. Please remember parents are as important as friends.

G. Remember that they brought you into this world.

    Once I was troubled by tourists to do a favor for them—take their photos. Sometimes they complained that the photos I took were not good.

    Now fellow travelers trouble me in a different way—with their selfie sticks (自拍杆). I fear my head will be knocked or my eyes poked (戳) by the poles with mobile phone cameras put on them.

    Admittedly, it is a good invention. With a cool $3, you can take solo or group photos without asking for a favor from strangers. But if you want to take your selfie sticks out to travel to the West, think twice. Selfie-sticks bans have been spreading in some of the world's important museums, galleries, parks and soccer stadiums including Disney. Visitors have to leave their selfie sticks in a locker before entering to protect paintings, individual privacy and the overall visitor experience.

    In China, selfie sticks are still widely used. People would do anything to take a perfect selfie and don't pay attention to their surroundings and other travelers. Many examples have shown things could go horribly wrong when people were taking selfies. For example, earlier this year, a starfish died at the Shanghai Science and Technology Museum after a visitor took it out to take a selfie, and last year a criminal was caught by the Chinese police after the criminal posted a selfie of himself on Wudang Mountain and shared it on social media, according to the Xinhua News Agency.

    Thus, I strongly advise travelers not to take a selfie in a crowded public place, indoors or at any sensitive places such as cemeteries and memorial places, especially when the police are looking for you. If you are a die-hard selfie fan, there are some options cooler than a selfie stick. One is a waterproof (防水的) wrist-band called a “pop stick”. Just like the slap bracelets (手镯) we used to wear when we were kids, it unrolls into a stiff selfie stick. Another one is “selfie ring”, an accessory that helps you stick your phone to your hand so you can snap better selfies.

    An Israeli law banning too skinny models went into effect with the start of 2013. The law, approved last March in Israel, requires models to prove they have maintained a Body Mass Index (BMI) of at least 18.5 for three months before a fashion show. That means a woman who is 68 inches tall can weigh no less than 119 pounds.

    "This law is another step in the war against eating disorders," said physician Adatto. "Underweight models," he explained, "can no longer serve as role models for innocent young people who copy their false image of being skinny."

    But some critics in this country say it is misguided, focusing on weight instead of health. They also say the Israeli ban is bound to fail because of the strong power of the fashion industry. "I think it's an approach that isn't going to work." said eating disorder expert Susan Ice, who worked with an organization which creates a healthy working environment for models.

    But Adatto told the reporter that he began to concern the issue after meeting an ambitious model who looked like she needed to be hospitalized. He said. "I realized that only legislation(立法) can change the situation. There was no time to waste; so many girls were dieting to death."

    However, the efforts to regulate models' weight in Spain and Italy have not resulted in significant changes in part because of difficulties in determining reliable methods of measuring weight and health.

    Still, folks including Ice say there's no denying that images from Hollywood and the fashion industry can be difficult for young women to deal with. "Certainly I don't believe the modeling industry has caused the rise in eating disorders, but it makes it harder," she says. "It's a difficult recovery environment, worshiping thinness as the beauty ideal."

    Almost every day we come across situations in which we have to make decisions one way or another. Choice, we are given to believe, is a right. But for a good many people in the world, in rich and poor countries, choice is a luxury, something wonderful but hard to get, not a right. And for those who think they are exercising their right to make choices, the whole system is merely an illusion, a false idea created by companies and advertisers, hoping to sell their products.

    'The endless choice gives birth to anxiety in people's lives. Buying something as basic as a coffee pot is not exactly simple. Easy access to a wide range of everyday goods leads to a sense of powerlessness in many people, ending in the shopper giving up and walking away, or just buying an unsuitable item that is not really wanted. Recent studies in England have shown that many electrical goods bought in almost every family are not really needed. More difficult decision-making is then either avoided or trusted into the hands of the professionals, lifestyle instructors, or advisors.

    It is not just the availability of the goods that is the problem, but the speed with which new types of products come on the market. Advances in design and production help quicken the process. Products also need to have a short lifespan so that the public can be persuaded to replace them within a short time. The typical example is computers, which are almost out-of-date once they are bought. This indeed makes selection a problem. Gone are the days when one could just walk with ease into a shop and buy one thing; no choice, no anxiety.

    A new device (设备) called Orion is helping those who are blind to see. It does this in a new way by helping them experience the world around them.

    Jason Esterhuizen lost his eyesight after a car accident. He never thought he would be able to see light or movement again. But now with the movement of a switch (开关), his world suddenly grew brighter.

    He says, "I still can't put it into words. I mean from being able to see absolutely nothing, it's completely black, to all of a sudden seeing little flickers (闪烁) of light move around." It is not full or normal sight, but Esterhuizen can move about in the world around him.

    The new technology uses several parts. One is a small device placed in the brain. The other parts are a video camera on sunglasses and a processing device that can be carried in a person's clothes. When the user points the camera, a signal goes to the processor (处理器) and then back to the glasses. The glasses then are in wireless communication with the device in the brain. The information causes a pattern to develop in the part of the brain. The pattern helps users sense or see movement and shapes of light. And it all happens in seconds.

    Esterhuizen is one of just two people in the U.S. testing this technology. He says that "I can tell someone moving across the room, walking past me or walking away from me, or it's a light against the wall. It is just amazing to have some form of functional vision again." He adds that now he can do everyday activities around his home that he once could not. It is easier to walk outside.

    The researchers believe that one day this technology could help people who have lost their vision because of illnesses like diabetes. It may also help those with poor vision or who were born blind.