Each passenger needs a farecard to enter and go out .Up to two children under age five may travel free with a paying customer .

    Farecard machines are in every station .Bring small bills because there are no change machines in the stations and farecard machines only provide up to $5 in change.

    Get one ticket of unlimited Metrorall rides with a One Day Pass .Buy it from a farecard machine in Metro stations .Use it after 9:30 a,m. until closing on weekdays , and all day on weekends and holidays .

    Hours of service

    Open 5am  Mon-Fri             7a.m  Sat-Sun

    Open midnight Sun-Thur.

    Last train times vary .

Train times Posted in stations

    Metrobus

    When paying with exact charge , the fare is $1.35.When paying with a SmarTripⓇcard , the fare is

    1.25.

    Fares

    Senior citizens 65 and older and disabled customers may ride for half the regular fare .On Metrorail and Metrobus , use a senior/disabled farecard or Smar/Trip Ⓡ card .For more information about buying senior .disabled farecard , SmarTripⓇcards and passes , please visit MetroOpensDoors .com or call 202-637-7000and 202-637-8000.

    Senior citizens and disabled customers can get free guide on how to use proper Metrobus and Metrorall services by calling 202-962-1100.

    Travel tips (提示)

    Avoid riding during weekday rush periods –before 9:30 a.m. and between 4and 6p.m.

    If you lose something on a bus or train or in a station, please call Lost &Found at 202-962-1195,

    2017 was an influential year for artificial intelligence (人工智能), not just in terms of the advancement of the technology itself, but also for the development of our understanding of AI's impact on our society.

    When we talk about AI, often we focus on the belief that it is going to take away certain types of jobs. However, we often ignore the fact that this technology will also slowly spread into most of our lives.

    Thanks to the development of AI, we are on the highway of IA, (human) intelligence augmentation (增强). Despite the great steps we've made in AI development and will continue to make in 2018, we are still years away from AI fully replacing human jobs. However, we are much closer to seeing the impact of AI spread into almost every job and the growth in human intelligence.

    Take a doctor for example: AI will soon be able to detect and diagnose common diseases more quickly and accurately than humans. Now, doctors can spend more of their time explaining the possible diagnoses, communicating with patients and developing unique, reliable treatment plans that are most effective for each specific patient.

    However, AI is so powerful and its adoption will only accelerate as it begins to help our work and allow us to focus on the parts of our job that are most important. But part of why AI is so attractive is also why it's so dangerous. That is, that same power allows AI that are making incorrect decisions to do so with greater speed and impact than humans have ever had.

    This is why, as AI becomes more useful in 2018, it will also become more closely examined. 2018 will be the year when companies purchasing AI products don't just ask about the power of AI—they will make sure that it is tested carefully in advance, minimizing their potential unexpected impact.

    Happy Shakespeare Day!

    The 23rd April is World Book Day, but did you know that it is also Shakespeare Day? Everybody has heard of Shakespeare, but do you know many plays he wrote? Have you heard of many of his poetry?

    Shakespeare's plays fit into three categories: tragedies, comedies and histories. Perhaps his most famous play is the tragedy story of Romeo and Juliet, which deals with two young lovers who are forbidden to marry by their parents. Other tragedies include Hamlet, a play about a vengeful ghost Othello, about an army general who is manipulated(操纵) into killing his wife, and Macbeth(麦克白). If you've seen Harry Potterandthe Prisoner of Azkaban written which is sung in the Great Hall after the Sorting Ceremony. These words come from the Witches in Macbeth!

    Shakespeare's comedies include Much Ado About Nothing, A Midsummer Night's Dream and Twelfth Night. Twelfth Night is a play about confusing identities. Two twins are shipwrecked and the sister, Viola, dresses up as her brother, Sebastian, who she thinks is dead. It's hilarious, because the brother reappears without Viola realizing and there's a big love triangle going on: Viola is in love with the Duke Osino, who is in love with Olivia, who falls in love with Sebastian, except she doesn't realize that Sebastian is actually Viola dressed up! Everybody falls in love with the wrong person, but it is all made right in the end.

    The history plays, such as Antony and Cleopatra, Richard III and Henry V are based on the lives of real historical people. Antony and Cleopatra is a story about a doomed romance in ancient Egypt. Cleopatra becomes Antony's mistress and Antony becomes so obsessed with her that he loses his military might. Cleopatra kills self by letting a snake bite her after Egypt's army has been defeated by Octavius and Antony kills himself too.

    Shakespeare's plays can be very heavy going sometimes. Some of the themes they deal with are heavy and complex, so they almost always contain a lighter subplot with characters who aren't closely linked to the characters in the main plot. They are often used in tragedies to lighten the mood of the play and to keep the audience interested in the main plot.

    “Don't tell anyone”. We hear these words when someone tells a secret to us. But it can be hard to keep a secret. We5re often tempted to “spill the beans"，even if we regret it later.

    According to Asim Shah, professor in the Menninger Department of Psychiatry and Behavioral Sciences at Baylor College of Medicine, US, keeping a secret may well "become a burden”. This is because people often have an “obsessive and anxious urge to share it with someone”.

    An earlier study, led by Anita E. Kelly, a scientist at the University of Notre Dame, US, suggested that keeping a secret could cause stress. People entrusted (受委托的)with secrets can suffer from depression, anxiety, and body aches, reported the Daily Mail.

    But with secrets so often getting out, why do people share them at all? Shah explained that people often feel that it will help them keep a person as a friend. Another reason people share secrets is guilt over keeping it from someone close to them. A sense of distrust can develop when people who are close do not share it with each other. "Keeping or sharing secrets often puts people in a position of either gaining or losing the trust of someone,” according to Shah.

    He added that talkative people could let secrets slip out (泄露). But this doesn't mean that it is a good idea only to share secrets with quiet people. A quiet person may be someone who keeps everything inside. To tell such a person a secret may cause them stress, and make them talk about the secret.

    Shah said that to judge whether to tell someone a secret, you'd better put yourself in their position. Think about how you would feel to be told that you mustn't give the information away. Shah also recommended that if you accidentally give up someone's secret you should come clean about it. Let the person know that their secret isn't so secret anymore.

    Vacation in the U. S. usually means slower days, and no school teachers know, however, that vacation means students will likely fall behind, and forget things they learned during the year. Simon Vanderpool, a special education teacher in Lexington, Kentucky, decided to do something about it.

    He started a program called Books and Barbers. Children go to the barber, choose a book and read out loud while the barber cuts their hair. The child gets a sticker and can take the book home. And there is an added bonus: money. The kids get paid to read.

    Vanderpool says barber shops are places where kids can feel comfortable. "Once a student feels comfortable, that's whenever the brain opens up, and that they are able to start focusing on nothing but learning." Amir Shalash owns a barber shop. But he is doing more than cutting children's hair. He is listening to them read, and helping them with their reading.

    Most of the children getting haircuts at barber shops are boys. Vanderpool's idea was to do more than just help them with reading and money. The teacher wants to help kids who are growing up in a home without a father liike he did. Also, I created the program in order to provide a positive mentor(指导者）for the kids that go into the barber shop, and are able to have someone that they can rely on and they can trust in, and just build a bond between the two of them." Shalash says he and his fellow barbers like being mentors.

    "The biggest thing is that we try to influence as many kids as we can, and that was my whole intention of it."