A brain can also simply be a smartperson,  If a person is called brainy,she is smart and intelligent. If a family has many children but one ofthem is super smart, you could say, "She's the brains in the family. "And if you are the brains behind something you are responsible for developing or organizing something. For example, Bill Gates is the brains behind Microsoft Brain trust is a group of experts who give advice. Word experts say the phrase "brain trust" became popularwhen Franklin D. Roosevelt first ran for president in 1932, Several professors gave him advice on social and political issues facingthe U.S.

    These professors were called his "braintrust." These ways we use the word"brain" all make sense. But other ways we use the word are not so easy to understand. Forexample, to understand the next brain expression, you first need to know theword “drain." As a verb to drain means to, remove something by letting it flow away. So abrain drain may sound like a disease where the brain flows out the ears. But, brain drain is when a country's most educated people leave their countries to live in another. The brains are, sort of, draining out of the country.

    However, if people are responsible for agreat idea, you could say they brainstormed it. Here, brainstorm is not an act of weather. It is a process of thinking creatively about a complex topic. Forexample, business leaders may use brainstorming to create new products, and government leaders may brainstorm to solve problems.

    If people are brainwashed, it does notmean their brains are nice and clean. To brainwash means to make someone accept new beliefs by using repeated pressure in a forceful or tricky way. Keep inmind that brainwash is never used in a positive way.

    A crisis is on the way．Global warming? The world economy? No，the decline of reading．People are just not doing it anymore，especially the young．Who's responsible? What is responsible? The Internet，of course，and everything that comes with it—Facebook，Twitter，etc..

    There's been a warning about the coming death of literate civilization for a long time．In the 20th century，first it was the movies，then radio，then television that seemed to end the written world．None did．Reading survived；in fact it not only survived，it has developed better．The world is more literate than ever before — there are more and more readers．and more and more books．

    The fact that we often get our reading material online today is not something we should worry over．The electronic and digital revolution of the last two decades has arguably shown the way forward for reading and for writing．Interconnectivity allows for the possibility of a reading experience that was barely imaginable before．Where traditional books had to make do with photographs and illustrations，an e-book can provide readers with an unlimited number of links：to texts，pictures，and videos．

    On the other hand，there is the danger of trivialization(碎片化)．One Twitter group is offering its followers single-sentence-long“digests”of the great novels．War and Peace in a sentence? You must be joking．We should fear the fragmentation(碎片)of reading．There is the danger that the high-speed connectivity of the Internet will reduce our attention span—that we will be incapable of reading anything of length or which requires deep concentration．

    In such a fast-changing world，in which reality seems to be remade each day，we need the ability to focus and understand what is happening to us．This has always been the function of literature and we should be careful not to let it disappear．Our society needs to be able to imagine the possibility of someone entirely in pace with modern technology but able to make sense of a dynamic，confusing world．

    Rapid advances in a new technology will soon transform science fiction into reality — meaning people will have driverless cars, small robots at their command and the ability to experience being in another place without leaving home, predicted Google executive chairman Eric Schmidt at the Mobile World Congress in Barcelona, the planet's largest cell phone trade show.

    Introduction of books available online, Internet translation of languages and voice recognition for computers all happened much faster than anyone could foresee and that technological research into even more previously unheard of advances is progressing at a fast speed.

    “People who predict that holograms（全息图）and self-driving cars will become reality soon are absolutely right,” Schmidt told thousands of attendees. Research under way will lead to situations where people can put themselves at events like a rock concert so that they can see, hear and even feel the event. And turn down the volume, if it's too loud.

    One attendee said she was scared that the possibility could be dehumanizing, but Schmidt replied by holding up his cell phone into the air. “It has an off button and it is here on the right,” Schmidt said. “My point is that it is all about your control. If you don't like my version of a rock concert, I'm not forcing you to go.” In the future, small robots could be used so busy people can send them to events for video and voice transmissions when their presence isn't required, Schmidt said.

    Technology in the near future will redefine the relationship among people in the world. “With technology comes power and with power comes choice, and smarter resourceful citizens are going to demand a better deal for their new life,” Schmidt said.

    Winter sports tend to be more dangerous than summer sports — they take place mostly outside at the mercy of ice or snow, involving (牵涉) metal edges, extreme speeds and crashes. Skeleton (俯视冰梭), however, stands apart as one of the most difficult and least accessible of all the winter sports. Adam Edelman, Israel's first Olympic skeleton athlete, would like to change that.

    Edelman was the 10th athlete named to the 2018 Israeli Olympic Team. Qualifying for the Olympics in any sport is impressive. But it's more impressive if you qualify for the Olympics after only four years in the sport — and without a coach.

    Edelman was first introduced to skeleton watching the game on television in late 2013. Sports have always been a part of his life. He grew up playing football and was a goalkeeper on the Massachusetts Institute of Technology football team. Ready for a new challenge, he set his sights on the Olympics.

Without a coach, Edelman learned to drive by watching endless hours of YouTube videos and taking more runs than anybody else on the track. “When everybody else would take three runs per day, I would take six to eight.” he recalled.

    Succeeding in skeleton takes a large amount of athletic ability and technical skill, but there's one more element (因素) required, one that can't be taught. “These tracks but built in the middle of nowhere, and it's gray and cold. You haven't seen your family in seven months and you really just want to give up. To continue, it takes tenacity.” Edelman said.

    Edelman is already looking beyond Pyeongchang. The 2022 Olympics could be in his future, but whether he continues to compete or not, he promises to stay in Israeli sports as long as possible-as instructor or as a coach.

    To be honest, I do not know Sybrina Fulton. Nor can I claim to understand the depth of her pain. Yet, we share a deep connection. A common feature experienced by those women who face the challenge of raising a Black male child in a nation that far too often views Black male bodies through fear. You see, Ms. Fulton is living my nightmare (噩梦). A constant worry that has stayed in the back of my mind since the birth of my eldest son, some sixteen years ago.

    Through the years, I have witnessed the world's reaction to my son evolve as he has grown from a small boy to a young man. In his early years, his easy smile and lovable character were nothing less than magnetic (有磁性的). Complete strangers would approach him in the street, draw him into conversation, and find themselves easily struck by his lively spirit. Even at that time I worried, how would my son react when in the years to come some of those who found themselves so impressed by this cute, intelligent boy, might grasp their purse tighter as he walked by.

    Over the years I have sought to protect his spirit from the hurt that comes from undeserved hatred. I have also sought to arm him with the knowledge that could one day save his life. He knows, for example, that if he is ever pulled over by the police, that he is to keep both hands on the wheel at all times and only reach for his license when the officer is specifically observing his actions. He knows, even in less threatening situations, that rough play and loud interactions with his buddies of any color will be viewed very differently when he does it, than when his white friends display the very same behavior. Still, the truth of the matter is, no amount of advice or voiceless behavior overcomes the physical, immovable fact of the color of his skin. His intelligence, easy smile, and lovable character won't protect him from unfounded assumptions of criminality.

    What makes the Trayvon Martin travesty (歪曲) of justice so painful to me, personally, is the knowledge that Trayvon's mother loved her baby no less than I love mine. The various pictures of moments throughout a happy childhood that have now found a home on nationwide newscasts provides clear evidence of that. Yet no amount of love and care, and no words of advice could have saved her son from the cruel killing he faced at the hands of a self-appointed neighborhood watch-dog. And perhaps even worse, nothing could have prepared her for the inhuman way her son has been treated by officials even in death. To think for three long days, his parents searched for him while officials failed to inform them of his fate and instead, performed drug and alcohol tests on his lifeless body, while failing to do the same for his attacker—the only one of the two who indeed had a criminal past is frankly, unforgivable. To know that the words of her son's killer were given more weight than eye-witnesses and taped evidence of her child's screams and eventual death must be heartbreaking. But to also have to live with the fact that his attacker still breathes free while her son lays buried underground is certainly more than any sorrowful parent should have to endure (忍受).

    It is this type of pain that is not unfamiliar to the Black experience in America, for this is the Black mothers' burden. A burden we have endured for centuries. Yet, there is still the rightful expectation, that in modern-day America, the wheels of justice would not be stopped.

    So today, it is my hope that Trayvon's mother, father, family and friends can take some comfort in the fact that millions of Americans of every color stand with them in their fight for justice. This is a burden no family should have to endure alone.

    We will not give up. We will not forget. We will continue the fight until justice is done.

    Michelle Kwan was born on July 7, 1980, in Torrance, California. The daughter of Hong Kong immigrants (移民), Kwan watched her older brother play ice hockey as a kid. She began skating when she was five, and entered and won her first figure skating competition at seven. She won the world title in the 1994 World Championships at the age of 13, and earned a spot as an alternate (候补者) for the 1994 Olympic Games. Kwan went on to capture the world title in 1996, 1998, 2000, 2001 and 2003.

    At the Nagano Winter Olympics in 1998, Kwan was believed to win gold, but ended up with a disappointing silver medal when fellow US skater Tara Lipinski surprisingly took first place. Shortly before the Salt Lake City Winter Olympics in 2002, Kwan, who was then the reigning world champ, surprisingly fired both her choreographer (编舞者), Lori Nichol, and longtime coach, Frank Carroll. Once again, she failed to get the gold medal when she finished third behind Irina Slutskaya of Russia and US skater Sarah Hughes, who took first.

    As a student at the University of California at Los Angeles, Kwan has continued to compete since her defeat (战败) in Salt Lake City. In February 2006, she was unable to take part in the Olympic Games in Torino, Italy because of a serious injury. Though Michelle Kwan did not compete during the 2006－2007 figure skating season, she has turned down an offer to work for NBC Sports and says she is not retiring.