Black History Month is also known as the African-American History Month. It is celebrated all over the United States of America and Canada in the month of February, while in the United Kingdom it is celebrated in October. Each and every school and university conducts various activities to make the generation aware of the importance that African-American history holds in the nation. The electronic media is filled with themes inrelevance to the occasion, and many activities are carried out across the country to remember the contribution made by African-American citizens in the development of this nation.

    Black History Month was first started bya famous African-American historian Dr. Carter G. Woodson in the year 1926. February was chosen as the month to celebrate the African-American history because it was the birth month of two of the most highly valued people among African-Americans. These were President Abraham Lincoln, who freed the slaves, and Frederick Douglass, who was also the first vice presidential nominee (被任命者) amongAfrican-Americans. Initially, Black History Month was known as the “NegroHistory Week”. This was Dr. Woodson's attempt to encourage awareness amongcitizens about the contribution of African-Americans towards the building of the nation. It was only in the early 1970's that the name “Negro History Week”changed to “Black History Month”. And later, in the year 1976, the entire monthof February was declared to be the National African-American History Month, orthe Black History Month.

Every year, National African-AmericanHistory Month is celebrated by many activities with various ideas and themesfor the younger generation. In 2013, Black History Month celebrates the 50^th anniversary of the March on Washington at which Martin Luther King, Jr. gavehis famous speech “I have a dream”. It also marks the 150^th anniversary of the Emancipation Proclamation (解放黑奴宣言). The theme for Black History Month in 2014 is “Civil Rights in America” remembering the important milestones by African-Americans and others in the battle for civil rights and equaltreatment under the law.

    Public transport is declining in the rich world. To those who have to squeeze onto the number 25 bus in London, or the A train in New York, the change might not be noticeable. But public transport is becoming less busy in those places, and passenger numbers are flat or falling in almost every American city. That is despite healthy growth in urban populations and employment.

    Although transport agencies blame their unpopularity on things like road works and broken signals, it seems more likely that they are being outcompeted. App-based taxi services like Uber and Lyft are more comfortable and convenient than trains or buses. Cycling is nicer than it was, and rental bikes are more widely available. Cars are cheap to buy, thanks to cut-rate loans, and ever cheaper to run. Online shopping, home working and office-sharing mean more people can avoid travelling altogether.

    The competition is only likely to grow. More than one laboratory is developing new transport technologies and applications. Silicon Valley invented Uber and, more recently, apps that let people rent electric scooters(滑板车) and then abandon them on the pavement. China created sharing-bicycles and battery-powered "e-bikes", both of which are spreading.

    Transport agencies should accept the upstarts, and copy them. Cities tend either to ignore app-based services or to try to push them off the streets. That is understandable, given the rules-are-for-losers attitude of firms like Uber. But it is an error.

    It is doubtful that most people make hard distinctions between public and private transport. They just want to get somewhere, and there is a cost in time, money and comfort. An ideal system would let them move across a city for a single payment, transferring from trains to taxis to bicycles as needed. Building a platform to allow that is hard, and requires much sweet-talking of traditional networks as well as technology firms. It is probably the secret to keeping cities moving.

    Benito Juarez, a poor Indian boy, was twelve years old when he left his village home in December 1818.Benito walked forty-one miles to the city of Oaxaca, high in the mountains of Mexico. When he heard the Spanish spoken by the city people, Benito didn't know what they were saying.

    First, Benito became a servant for a wealthy gentleman, Serer Maza. Soon, he went to work for Antonio Salanueva ,a church(教会)librarian. Antonio repaired and copied the library books, keeping them in good shape.  Benito became his helper and his housekeeper. Antonio loved to teach. Benito soon became his student as well as his servant. With the help of Antonio, Benito learned to speak, read, and write Spanish.

    At that time in Mexico, many people believed that Indians were not smart enough to read or learn. Antonio knew that was not true. Indians had been prevented from learning by a lack of schools. The first Spanish missionaries(传教士)who came to Mexico had educated the native people. In fact, churches from Spain had built the first college on the North American continent(大陆)for the Indians. As more Spanish came to Mexico, however, the Indian children were crowded out of the schools.

    Benito was a good and bright student, so Antonio developed a plan for him. In 1821, when Benito was fifteen, Antonio decided to enroll him in a school for boys. Antonio taught Benito what he needed to pass the entrance test for the school.

Benito became a student at the college. His studies were difficult, and he was teased because he was the only Indian student there. He succeeded in spite of these challenges. Later, as the laws changed, Benito was able to attend a public college with other Indians.

    Benito Juarez continued his education and became a lawyer and, much later, the President of Mexico from 1861 to 1872. He led the Mexican people to victory over the French, who tried to rule Mexico, and fought for the rights of Indians. He is one of the great heroes in Mexican history.

    Many of us listen to music while we work, thinking that it will help us to concentrate on the task at hand. And in fact, recent research has found that music can have beneficial effects on creativity. When it comes to other areas of performance, however, the impact of background music is more complicated.

    The idea that listening to music when working is beneficial to output probably has its roots in the so-called “Mozart effect”. Put simply, this is the finding that spatial rotation performance(空间旋转能力) is increased immediately after listening to the music of Mozart, compared to no sound at all.

    How sound affects performance has been the topic of research for over 40 years, and is observed through a phenomenon called the irrelevant sound effect. To study irrelevant sound effect, participants in the research are asked to complete a simple task which requires them to recall a series of numbers or letters in the exact order in which they saw them. The tricky thing is being able to do this while ignoring any background noise.

    Two key characteristics of the irrelevant sound effect are required for its observation. First, the task must require the person to use their rehearsal abilities(复述能力), and second, the sound must contain acoustical variation(声学变化). Where the sound does not vary much acoustically, the performance of the task is much closer to that observed in quiet conditions.

    The irrelevant sound effect itself comes from attempting to process two sources of ordered information at the same time—one from the task and one from the sound. Unfortunately, only the former is required to successfully perform the  recall task, and the effort in ensuring that irrelevant order information from the sound is not processed actually hinders(阻碍) this ability.

    A similar conflict is also seen when reading while in the presence of lyrical music. In this situation, the two sources of words—from the task and the sound—are in conflict. The cost is poorer performance of the task in the presence of music with lyrics.

    What this all means is that whether having music playing in the background helps or hinders performance depends on the task and on the type of music, and only understanding this relationship will help people maximize their productivity levels.

    There are moments in life when you miss someone so much that you just want to pick them from your dreams and hug them for real! Dream what you want to dream; go where you want to go; be what you want to be, because you have only one life and one chance to do all the things you want to do.

    May you have enough happiness to make you sweet, enough difficulties to make you strong, enough sorrow to keep you human, enough hope to make you happy.

    Always put yourself in others' shoes. If you feel that it hurts you, it probably hurts the other person, too.

    The happiest people don't necessarily have the best of everything; they just make the most of everything that comes along their way. Happiness lies for those who cry, those who hurt, those who have searched, and those who have tried, for they can appreciate the importance of people who have touched their lives.

    Love begins with a smile, grows with a kiss and ends with a tear. The brightest future will always be based on a forgotten past, and you can't go on well in life until you let go of your past failures and heartaches.

    When you were born, you were crying and everyone around you was smiling. Live your life so that when you die, you're the one who is smiling and everyone around you is crying.

    Please send this message to those people who mean something to you, to those who have touched your life in one way or another, to those who make you smile when you really need it, to those who make you see the brighter side of things when you are really down, to those who you want to let know that you appreciate their friendship. And if you don't, don't worry; nothing bad will happen to you. You will just miss out on the opportunity to brighten someone's day with this message.

It is amazing how many of the things in science fiction and movies have become reality.For instance,in the movie Star Trek,the workers could go to a replicator(复制器) and order food,drinks or anything they could program into the computer.Before long,the item would appear.This is possible today,in a way,with technology we have had for years.

Several manufacturers(制造商) have created 3D printers.One company,MakerBot,has created a printer that the average person can afford.It is called The Replicator.You can download a lot of design software from the Internet for use with The Replicator.In the near future,rather than going to a store to buy what you need,you may be able to download what you want from the Internet and print it out at home.

The process was first used with music.At the very beginning,music was recorded onto plastic disks with etching(蚀刻法).Music can now be copied without a physical product.____ Rather than having to buy a physical book or magazine,you can now download them from the Internet in digital form.

This technology is already used in engineering and architecture.Melissa Shoes,a Brazilian foot wear company,is using this technology to create shoes.Rather than having to go through the current process of product design and development,the company is able to design and print shoes for display to see how well they will sell before having lots of them made.