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,

    In this day and age,it may seem that getting two people with different views together to discuss them leads to a disaster.Just think about what would happen if you sat down and had an open and honest conversation with someone with completely opposing views.Could it bring you closer together?

    However,the Human Library Organization is counting on it.At a Human Library,people volunteer to become "books" and make their experiences open and available."Readers" are encouraged to ask them questions freely,and they'll get honest answers in return.There's no judgment,and no questions are off—limits.

    You won't find unpleasant comments,and you won't lose faith in humanity.At the Human Library,you actually feel letter about the world you live in.You might even make a new friend!

    "The human books consist of people who have been discriminated by society."said Ronni Abergel,the Human Library Organization's founder,who has set out to build a space for conversations that can challenge prejudices through dialogue."The most pleasantly surprising thing about it is how close all the human books become to one another."she said.

    Human Libraries help to remind us there really is more that unites us than divides us.And as events now spread throughout 82 countries,with Human Libraries even set to launch soon in Pakistan and Jordan,you can tell that is a shared feeling.

    "We can spend billions and billions in trying to build up homeland security and our safety,but real safety comes from having positive relations to other groups in your community."said Abergel,"Real safety is not going to come from building walls.It's going to come from reaching out and getting to know each other."

    As kids, my friends and I spent a lot of time out in the woods. "The woods" was our part-time address, destination, purpose, and excuse. If I went to a friend's house and found him not at home, his mother might say, "Oh, he's out in the woods," with a tone (语气) of airy acceptance. It's similar to the tone people sometimes use now a days to tell me that someone I'm looking for is on the golf course or at the gym, or even "away from his desk". For us ten-year-olds, "being out in the woods" was just an excuse to do whatever we feel like for a while.

    We sometimes told ourselves that what we were doing in the woods was exploring (探索). Exploring was a more popular idea back then than it is today. History seemed to be mostly about explorers. Our explorations, though seemed to have less system than the historic kind something usually came up along the way. Say we stayed in the woods, throwing rocks, shooting frogs, picking blackberries, digging in what we were briefly persuaded was an Indian burial mound.

    Often we got "lost" and had to climb a tree to find out where we were. If you read a story in which someone does that successfully, be skeptical; the topmost branches are usually too skinny to hold weight, and we could never climb high enough to see anything except other trees. There were four or five trees that we visited regularly-tall beeches easy to climb and comfortable to sit in.

    It was in a tree, too, that our days of fooling around in the woods came to an end. By then some of us has reached seventh grade and had begun the rough ride of adolescence (青春期). In March, the month when we usually took to the woods again after winter, two friends and I set out to go exploring. We climbed a tree, and all of a sudden it occurred to all three of us at the same time that we really were rather big to be up in a tree. Soon there would be the spring dances on Friday evenings in the high school cafeteria.

    Alison Malmon was trapping up (完成) the end of her freshman year at the University of Pennsylvania, US when she got the news: Her older brother Brian, a student at Columbia University, was suffering from mental illness.

    Inspired by this, Malmon formed a group at her university to empower (使能够) students to talk openly about mental health. It soon blossomed into a national organization that today has more than 450 campus chapters. Leaders with the organization spend their time talking with college students about the pressure that today's young people face.

    "What you hear often is just a need to be perfect," said Malmon, "and a need to present oneself as perfect."

    And a new study in the UK proved that this need for perfectionism is simply part of today's society. In the study, two researchers studied more than 40,000 students from the US, Canada, and the UK. They found that what they called "socially prescribed(社会定向型的) perfectionism" increased by a third between 1989 and 2016.

    Lead researcher Thomas Curran said that while so many of today's young people try to present a perfect appearance online, social media isn't the only reason behind this trend. Instead, he said, it may be driven by competition in modern society, meaning young people can't avoid being sorted and ranked in both education and employment. That comes from new norms(准则) like greater numbers of college students, standardized testing and parenting that increasingly emphasizes success in education.

    For example, in 1976, half of high school seniors expected to get a college degree of some kind. By 2008, more than 80 percent expected the same. The researchers also said changes in parenting styles over the last two decades might have had an impact. As parents feel increased pressure to raise successful children, they in turn pass their "achievement anxieties" onto their kids through "excessive(过多的) involvement in their child's routines, activities or emotions"

    Those in the mental health community like Malmon say they're concerned about the impact the culture of perfectionism has on mental health on campuses. "Mental health has truly become this generation's social justice issue," she said. "It's our job to equip them with the tools and to let people know that it's not their fault."

    A team of engineers at Harvard University has been inspired by Nature to create the first robotic fly. The mechanical fly has become a platform for a series of new high-tech integrated systems. Designed to do what a fly does naturally, the tiny machine is the size of a fat housefly. Its mini wings allow it to stay in the air and perform controlled flight tasks.

    "It's extremely important for us to think about this as a whole system and not just the sum of a bunch of individual components," said Robert Wood, the Harvard engineering professor who has been working on the robotic fly project for over a decade. A few years ago, his team got the go-ahead to start piecing together the components. "The added difficulty with a project like this is that actually none of those components are off the shelf and so we have to develop them all on our own," he said.

    They engineered a series of systems to start and drive the robotic fly. "The seemingly simple system which just moves the wings has a number of interdependencies on the individual components, each of which individually has to perform well, but then has to be matched well to everything it's connected to," said Wood. The flight device was built into a set of power, computation, sensing and control systems. Wood says the success of the project proves that the flying robot with these tiny components can be built and manufactured.

    While this first robotic flyer is linked to a small, off-board power source, the goal is eventually to equip it with a built-in power source, so that it might someday perform data-gathering work at rescue sites, in farmers' fields or on the battlefield. "Basically, it should be able to take off, land and fly around," he said.

    Wood says the design offers a new way to study flight mechanics and control at insect-scale. Yet, the power, sensing and computation technologies on board could have much broader applications. "You can start thinking about using them to answer open scientific questions, you know, to study biology in ways that would be difficult with the animals, but using these robots instead," he said. "So there are a lot of technologies and open interesting scientific questions that are really what drives us on a day to day basis."

The reopening of an Asian American-owned bookstore in Manhattan's Chinatown following a January fire has received a warm welcome back from its supporters.

Yu &. Me Books, which is regarded as the first female-owned Asian American bookshop in New York City, has raised more than $369,000 for repairs since a tragic fire on January 4. It reopened on Wednesday. "We are so excited to welcome you all back to our Yu &. Me Books home," the store announced on Instagram. "We can't wait to shed tears, laugh loudly and open our hearts with all of you who have made us feel at home."

The fire in an apartment above the bookstore on Mulberry Street killed one of the building's residents. Smoke and water damage also devastated Yu & Me Books, destroying almost all its inventory and equipment, according to a GoFundMe campaign that store owner Lucy Yu set up to make up for the costs.

During the restoration and renovation (翻新) of the original bookstore, the business operated from a location within The Market Line, an underground marketplace on the Lower East Side, and several pop-up shops (临时店铺) in the city.

"It was a bookstore I always wanted to visit, and I'm so happy that they were able to reopen," Charlotte Leinbach, a teacher for New York City's Education Department said. Leinbach hadn't been to the bookstore before the fire, but she had heard quite a bit about its fate. She bought two books, the second and third in the series Before the Coffee Gets Cold.

"It's hard to find a lot of books written in Japanese, and then translated into English," she said. "The design of the bookstore is really nice, and the layout is great. I am glad that they also sell used books. I love buying new books because it's fresh and it's nice, but it's always nice to see people in the community giving their books back and reselling and just passing them on." She said she will continue to support the women-run small businesses that focus on people and authors of color.

"I actually came on the day of the opening, but there were too many people, and it was too crowded, so I just haven't had a chance to look at it," Liam Li, another Asian American, said. "This place is unique. It's in Chinatown. As Asians live in New York City, I feel this offers the most space for the community. I understand like a minority in this society, it is not easy to have a store like this," she added.