You may be familiar with the following famous people, but have you heard of their graduation speeches, in which they either share their unforgotten experiences or give you some great inspiration(启迪).

    Michael Dell, University of Texas at Austin

    And now you've accomplished something great and important here, and it's time for you to move on to what's next. And you must not let anything prevent you from taking those first steps. ... You must also commit to the adventure. Just have faith in the skills and the knowledge you've been blessed (赐予)with and go.

    J.K. Rowling, Harvard University

    Half my lifetime ago ,I was striking an uneasy balance between my ambition and the expectation from my parents who were not rich...But what I feared most for myself at your age was not poverty(贫穷), but failure. The fact that you are graduating from Harvard suggests that you know little about failure, you might be driven by a fear of failure quite as much as a desire for success.

    Steve Jobs, Stanford University

    Sometimes life's going to hit you in the head with a brick. Don't lose faith...Your work is going to fill a large part of your life, and the only way to be truly satisfied is to do what you believe is great work, and the only way to do great work is to love what you do. If you haven't found it yet, keep looking, and don't settle.

    Bill Gates, Harvard University

    We need as many people as possible to have access to the advanced technology to lead to a revolution in what human beings can do for one another. They are making it possible not just for national governments, but for universities ,smaller organizations, and even individuals to see problems, see approaches and deal with the world's inequities（不公平）like hunger, poverty, and so on.

    If you wish to become a better reader, here are four important things to remember about reading rate:

    Knowing why you are reading or what you are reading to find out will often help you to know whether to read rapidly or slowly.

    Some things should be read slowly throughout. Examples are directions for making or doing something, arithmetic problems, science and history books, which are full of important information. You must read such things slowly to remember each important step and understand each important ideas.

    Some things should be read rapidly throughout. Examples are simple stories meant for enjoyment, news letters from friends, pieces of news from local, or home-town, papers, telling what is happening to friends and neighbors.

    In some of your reading, you must change your speed from fast to slow and slow to fast, as you go along. You will need to read certain pages rapidly and then slow down and do more careful reading when you come to important ideas which must be remembered.

    Metro Pocket Guide

    Metrorail(地铁)

    Each passenger needs a farecard(车票) 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 day of unlimited Metrorail 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：5 a.m. Monday-Friday, 7 a.m.Saturday-Sunday.

    Close：midnight Sunday-Thursday, 3 a.m. Friday-Saturday.

    Last train times vary. To avoid (避免) missing the last train, please check the last train times posted in stations.

    Metrobus

    When paying with exact change，the fare is $1.35. When paying with a SmarTrip card the fare is $1.25

    Fares for senior/disabled customers

    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 SmarTrip^® card.For more information about buying senior/disabled farecards，SmarTrip^® cards and passes，please visit MetroOpensDoors.com or call 202­637­7000 and 202­637­8000.

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

    Travel tips

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

    If you lose something on a bus or train or in a station，please call Lost & Found （失物招领）at 202­962­1195.

    We know that our pet dogs and cats can recognize our faces, but our pet fish? A team of scientists from the UK and Australia have discovered that archer-fish(喷水鱼) can distinguish human faces!

    This marks the first time that a species of fish has shown such an ability. Such abilities have been previously shown in birds, but unlike fish, they have been proven to possess structures similar to the neocortex(大脑新皮层), the researchers added.

    "Being able to distinguish between a large number of human faces is a surprisingly difficult task," Dr Newport said, "mainly due to the fact that all human faces share the same basic features."

    During their experiments, Dr Newport and her colleagues presented archerfish with two images of human faces, and trained them to choose one by spitting jets(喷射流)of water at that picture. Next, the fish were presented with the familiar face and several that were unfamiliar, and were able to correctly pick the one that they had been trained to recognize, even when features such as head shape and color were removed from the selected pictures.

    In the first experiment, the archerfish were tasked with picking the previously learned face from a group of 44 new ones, which they did with 81 percent accuracy. In the second, the researchers decided to make things a little harder. They took the pictures and made them black and white and evened out (使平均) the head shapes. You would think that would throw the fish for a loop. But no, they were able to pick the familiar face even then—and with more accuracy: 86%!

    "Fish have a simpler brain than humans and entirely lack the section of the brain that humans use for recognizing faces. Despite this, fish may still be capable of finding the face they are trained to recognize," Dr Newport said. "The fact that archerfish can learn this task suggests that complicated brains are not necessarily needed to recognize human faces."

    He met her at a party. She was outstanding; many guys were after her, but nobody paid any attention to him. After the party, he invited her for coffee. She was surprised! In order not to appear rude, she went along.

    As they sat in a nice coffee shop, he was too nervous to say anything and she felt uncomfortable. Suddenly, he asked the waiter, "Could you please give me some salt? I'd like to put it in my coffee."

    They stared at him. He turned red, but when the salt came, he put it in his coffee and drank. Curious, she asked, "Why salt with coffee?" He explained, "When I was a little boy, I lived near the sea. I liked playing on the sea. I could feel it salty, like salty coffee. Now every time I drink it, I think of my childhood and my hometown. I miss it and my parents, who are still there."

    She was deeply moved. A man who can admit that he's homesick must love his home and care about his family. He must be responsible. She talked too, about her far away hometown, her childhood, her family. That was the start to their love story.

They continued to date. She found that he met all her requirements. He was kind, warm and careful. She thought she would have missed the catch if not for the salty coffee! So they married and lived happily together. And every time she made coffee for him, she put in some salt, the way he liked it.

    After 40 years, he passed away and left her a letter which said:

    My dearest, please forgive me my life-long lie. Remember the first time we dated? I was so nervous that I asked for salt instead of sugar. Sweetheart, I don't exactly like salty coffee. But as it means so much to you, I've learned to enjoy it. Having you with me was my greatest happiness. If I could live a second time, I hope we can be together again, even if it means that I have to drink salty coffee for the rest of my life.

    A few days ago I was sitting in a Thai restaurant enjoying a meal when I got a phone call from a friend I hadn't spoken to for a long time. Full of enthusiasm and excitement I talked slightly louder than usual and in Spanish, my mother tongue.

    A few minutes into the call the lady sitting beside me got up, seemingly upset, and asked the restaurant staff to relocate her to a table as far away as possible from "this man who won't get off his phone"

    I sank in my seat out of embarrassment. I ended the call soon afterwards and felt the urge to go over and apologize. Before getting up I looked around to see where she was and I found she was, indeed, at the table furthest away from me. I noticed that the lady was alone and staring out of the window, looking a bit sad.

    Right then I quit my plan for a conventional apologetic gesture and decided to conduct an experiment. Seeing those funny smile cards in my wallet, I took one out. When signing my check I asked the waiter to secretly charge the lady's meal to my credit card instead of her bill.

    I left the restaurant, letting the waiter know I would be back in a few hours to pick up my credit card. I returned later as promised, excited to learn the result.

    To my pleasant surprise, things turned out the best possible way. A group of restaurant staff approached me with joy, telling me that the lady had dined there many times, but they had never seen her smile and laugh like she did upon receiving the smile card and the $0 check.