It was a hot, humid day, and my brother Walt and I had decided that the only way to survive it would be to go swimming in a deep swimming hole across Mr. Blickez's pasture(牧场) and through some woods.

    The only problem with our plan was that this pasture was guarded by a huge, mean Hereford bull. Mr. Blickez had told us that Elsie was them eanest bull in the township, maybe even the county, and we believed him. But the hotter it got, the more we thought there was something doubtful about his claim. For one thing, we remembered Mr. Blickez liked telling tall tales; for another, Elsie seemed like an odd name for a bull.

    Finally, I talked Mom into asking permission for us to walk through the pasture, but then another problem surfaced. Mom said she would talk to Mr. Blickez if we would take our cousin Joanie along with us. Joanie was almost two years older than me and a head taller. If her teasing ever got around my grade school, it would be all over for me. In fact, I still had a headache from a quarrel with her that morning. “I'm not going swimming with that dumb girl cousin.” I told my mom.

  “Either Joanie goes with, or you stay home alone,” Mom said inher serious tone. I gave in and we set out. On our way across the pasture, Walt yelled suddenly. Elsie had approached him quietly and was licking(舔) his back. Joanie and I dove under the wire fence, but while I was on the ground I looked up and saw that Elsie wasn't a big mean bull after all. She was going to keep licking my brother's back as long as he stood still.

    We had many good days growing up and visiting our secret swimming hole guarded by the so-called “big mean bull”. And as it turned out, fora girl cousin, Joanie hasn't been too bad. She's been one of my best friendsover the years.

    It seems that no one can live a happy life without friendship. While a great number of people expect others to be their friends, they don't give friendship back. That is why some friendships don't last long. To have a friend, you must learn to be one. You must learn to treat your friend the way you want your friend to treat you. Learning to be a good friend means learning three rules: be honest; be generous; be understanding.

    Honesty is where a good friendship starts. Friends must be able to trust one another. If you do not tell the truth, people usually find out. If a friend finds out that you haven't been honest, you may lose your friend's trust. Good friends always depend on one another to speak and act honestly.

    Generosity means sharing and sharing makes a friendship grow. You do not have to give your lunch money or your clothes. Naturally you will want to share your ideas and feelings. These can be very valuable to a friend. They tell your friend what is important to you. By sharing them, you help your friend know better.

    Sooner or later everyone needs understanding and help with each other. Something may go wrong at school. Talking about the problem can make it easier to solve. Turning to a friend can be a first step in solving the problem. So to be a friend you must listen and understand. You must try to put yourself in your friend's place so that you can understand the problem better.

    No two friendships are exactly alike. But all true friendships have three things in common. If you plan to keep your friends, you must practice honesty, generosity and understanding.

    When Nancy Flexer opened the door to her classroom near the end of her final school year, all 41 years of her career as a beloved first-grade teacher came to life right in front of her.

    Cole Elementary School in Tennessee surprised Flexer with a memorable and emotional retirement party featuring former students of all ages, dating back to the first class she taught in the 1973-74 school year. A video of the event shows an overwhelmed Flexer being moved to tears as she hears former students who are now adults tell her how much she affected their lives.

    "I'm one of the luckiest people in this world," Flexer said. "I remember I opened the door to the classroom thinking no one was in there, and it was wall-to-wall people and banners and everything. It was the coolest thing that could've ever happened in my life. How many times do we really realize the lives we've touched, the manner in which we've touched them, and that these are memories that stay with them for life?"

    Despite being young when they were taught by Flexer, students easily recalled the heartwarming notes she wrote them on report cards, the ways she helped them overcome shyness and awkwardness, and how she inspired them to future academic success to earn scholarships and advanced degrees.

Even though Flexer hadn't seen some of the former students for decades, she instantly remembered the names of every single one there.

    A scrapbook(剪贴簿) of her career was presented to her as one student after another recalled the effect Flexer had on his or her life.

    “I've had many opportunities to move to a school closer to my home, but I said 'Cole gave me so much in my life that when I retire, I will retire from Cole school and give back what's been given to me.” Flexer said. “My career could've taken me nowhere that would have made me happier. I think of it as a blessing.”

    A blog posted Dec 7, 2018 at 12:17 PM by Alanna Mallon

    Alanna Mallon is a Cambridge City Councilor.

    Each year in November, I receive a flurry of emails and texts from friends who want to volunteer with their families on Thanksgiving as a way to give back. I also field phone calls from organizations who want to donate to local programs that provide Thanksgiving meals.

    However, as an official who still works in the nonprofit sector, I also feel deeply anxious because I know the other 51 weeks of the year, these critical programs that provide food access to residents in need are starving for both volunteers and donations. Hunger is a year round problem, and each week volunteers are the necessary part to ensure that programs are able to serve the community.

    At Food For Free, we rely on about 100 volunteers per week, and each of those volunteers is extremely important to providing fresh, healthy food to people in the Greater Boston area who need it. School children who take backpacks of food home on Fridays, community college students who rely on our Family Meals program to thrive in class, elderly and disabled residents who receive twice monthly deliveries of food to their doors through our Home Delivery program, — they all rely on us ensuring enough volunteers show up to do the work.

    These volunteers don't show up in your social media feeds, they don't win awards and no one writes about them in the local newspapers. But they are heroes. And you can be too.

    If everyone made a promise to volunteer once a month, or even once a quarter, I know that we could reduce some of the anxiety these organizations feel, as a more reliable volunteer network allows them to focus on helping people, not filling volunteer slots.

    Here is a list of a few organizations who are doing critical work in Cambridge to address food insecurity. Offer your time to an organization, they will be deeply grateful—and I am going to bet that you will feel pretty good about yourself too.

Food For Free: http://foodforfree.org/volunteer.

    CEOC: http://ceoccambridge.org/food-pantry.

    Harvard Square Homeless Shelter: https://hshshelter.org/volunteer.

    Community Cooks: https://communitycooks.org/join-us.

    Margaret Fuller Neighborhood House: http://margaretfullerhouse.org

    Do you ever pull your phone out of your pocket, thinking it is vibrating(振动), only to find that it isn't? This phenomenon, which scientists call "phantom(幻觉的)phone vibration", is very common. Around 80% of people surveyed say they have imagined their phones vibrating when they were actually still.

    So, what leads to this universal behavior? According to the BBC, the explanation lies in your brainˈs ability to discover signals from the outside world. When your phone is in your pocket, there are two possible states: it is either vibrating or not. Meanwhile, you also have two possible states of mind: the judgment that the phone is vibrating, or that it isn't. Ideally, you match the four states correctly.

However, sometimes your brain decides that the results of missing a call are more serious than a "false alarm". Therefore, you become more sensitive(敏感的) to vibrations so that you don't miss anything. This is just like the fire alarm in your home—it can be annoying when it goes off in response to just a tiny bit of smoke. But that's a small price to pay compared to a fire really breaking out because the alarm fails to alert you. Now, you might still ask: why can't our brains just make every judgment correctly without being too sensitive to false signals? The answer is that your brain bears a heavy burden every day. "You get a large amount of sensory(感觉的) information that's coming from your eyes, ears and skin, and you can't deal with all that information all the time, "Michael Rothberg, a researcher at Baystate Medical Center in Springfield, US, told Live Science.

    For example, the rustling(沙沙声)of clothing or the growling(咕咕声)of your stomach may both lead your brain to believe that they come from the vibration of your phone-it is like trying to hear your name being called in a noisy room.

    So, perhaps you should just check your phone whenever you think it's vibrating. It's not too much trouble to do that, is it?

    Most of us have looked up at the stars that fill the night sky and wondered whether we're alone in the universe. Indeed, the question of whether there's life out there has been something humankind's been asking itself for countless years. But thanks to China's Five-hundred-meter Aperture Spherical Telescope (FAST), the answer to this question may come a lot sooner than we expected.

    The telescope has a huge round reflector, which measures 500 meters across and has a perimeter(周长)of 1.6 kilometers. Because of its great size, it would have been both difficult and inefficient to get FAST to move like a regular telescope. Instead, FAST's designers came up with a great solution: its surface is made up of 4450 panels which can be individually adjusted. This clever design feature allows scientists to detect radio signals from any angle with a great degree of accuracy. "Panels can change their positions through connected wires and parallel (关联的) robots. We can control their position with an accuracy of 1mm," Zheng Yuanpeng, chief engineer of the telescope's panel project, told Xinhua News Agency.

    FAST's engineers also had the task of finding a suitable location. As any interference would affect its ability to detect distant radio waves, it needed to be built in a remote area. Luckily, the perfect spot was found in the beautiful mountains of Guizhou Province. "There are three hills about 500 meters away from one another, creating a valley that is perfect to support the telescope," Sun Caihong, chief engineer of FAST's construction, told Xinhua.

    And although it wasn't yet fully operated, FAST had already made great discoveries by October 2017. Since 1967, only around 2000 pulsars (脉冲星) have been discovered, yet FAST had detected six more by October 2017. Once FAST is fully up and running, we may finally have the answer to one of the biggest questions in history.