Dolphins(海豚) live in a dark underwater world. It's often impossible to see each other or anything else around them, so sound plays an important role in their survival. To communicate with each other, dolphins produce all kinds of sounds.

    Only other dolphins understand what the sounds mean. Scientists haven't uncovered their secret communication, except for one kind of whistle. It might last less than a second, but this whistle is a big deal. Why? Because these whistles are actually names of dolphins - and every dolphin has one. Scientists call these sounds a “signature whistle.” When other dolphins hear the whistle, they know which dolphin is calling.

    Dolphins often hunt by themselves but still need to stay connected to the group. Since they can't always see each other, dolphins use their signature whistles to check in with other dolphins hundreds of yards away. “In coastal areas, dolphins exchange whistles even when they're a third of a mile apart,” says Greg Campbell, who studies animals. That means dolphins shout out to group members that might be nearly five football fields away.

    What's amazing is who names the baby dolphin. Not the mother. Not an auntie dolphin or another group member. Scientists believe the baby dolphin itself comes up with the signature whistle. Like human babies, a baby dolphin plays with sounds throughout its first year. While testing its sound skills, a baby dolphin is doing something amazing. It's creating or figuring out its signature whistle. How or why it chooses its signature whistle is not clear. Studies show that most of the time the signature whistle is nothing like its mother's or group members' whistles.

    When the baby dolphin is about a year old, its signature whistle is set. It repeats it often so the other dolphins learn to recognize it.

    Deciphering(破译) dolphin names is just the beginning of figuring out what dolphins communicate about. Do they chat about sharks? Discuss the tides? Maybe they even have a name for people. Someday scientists are to decipher the rest of dolphins' communication.

A handsome middle-aged man walked quietly into the cafe and sat down. Before he ordered, he couldn't help but noticed a group of younger men at the table next to him. It was obvious they were making fun of something about him and it wasn't until he remembered he was wearing a small pink ribbon (丝带) on the lapel (翻领) of his suit that he became aware of what the joke was all about.

    The man pretended not to notice it, but the whisper and laughter began to get to him. He looked one of the rude young men straight into the eye, placed his hand beneath (在…下方) the ribbon and asked, “This?”

    With that the young men all began to laugh out loud. The man he spoke to said, “Hey, sorry, man, but we were just commenting on how pretty your little pink ribbon looks against your blue jacket!”

The middle-aged man calmly invited the joker to come over to his table, and politely seated him. As uncomfortable as he was, the young guy had to, not really sure why. In a soft voice, the middle-aged man said, “I wear this ribbon to bring awareness about breast cancer. I wear it in my mother's honor.”

     “Oh, sorry. She died of breast cancer?”

“No, she didn't. She's alive and well. But her breasts nourished (抚养，滋养) me as a baby, and were a soft resting place for my head when I was scared or lonely as a little boy. I'm very grateful for my mother's breasts, and her health.”

     “Umm,” the young replied, “yeah.”

     “And I wear this ribbon to honor my wife,” the man continued.

“And she's okay, too?” the young guy asked.

“Oh, yes. She's fine. Her breasts have been a great source of loving pleasure for both of us, and with them she nurtured (养育，培育) and nourished our daughter 23 years ago. I'm grateful for my wife's breasts, and her health.”

     “Uh, huh. And I guess you wear it to honor your daughter, also?”

“No. It's too late to honor my daughter by wearing it now……”

Shaken and ashamed, the young guy said, “Oh, I'm so sorry, mister.”

“So, in my daughter's memory, too, I proudly wear this little ribbon, which allows mo the opportunity to enlighten (启发，教导) others. And here…” With this, he reached in his pocket and handed the young roan a little pink ribbon. The young guy looked at it, slowly raised his head and asked, “……?”

    A ten-year-old boy from Howell, Michigan is being praised as a hero thanks to his persistence (坚持) that led to saving the life of an elderly neighbor. The event happened late in an evening when Danny DiPietro was being driven home from hockey practice by his mom.

    That's when the young boy noticed an open garage (车库) and a figure that he believed was a dog outside an apartment building near his house. Given the freezing weather, the young boy got a feeling that something was not right. But instead of dismissing it like most kids at his age, he insisted that his mother, Dawn, find out what was going on. Dawn tried to make Danny believe that no one would leave a dog out in such cold weather, but he refused to take no for an answer.

    Dawn finally gave in and decided to drive to the area with the family dog and see if there was any truth in Danny' s hunch (直觉). Sure enough, as she got closer to the apartment building she noticed a garage that was wide open and someone waving madly for help. Upon getting there, she realized that it was not a dog the young boy had seen, but Kathleen St. Onge. The 80-year-old woman had fallen down on some ice in front of her garage and had been lying there for two hours, unable to get up.

    Dawn rushed home to get her husband to help and called 911. The two then returned with some blankets to cover Ms. St. Onge, while they were waiting for the ambulance to arrive. Though still in hospital, the elderly woman is recovering well and forever grateful to Danny for following his hunch!

    Sometimes the best gift is the one you can use at home. These items will likely be appreciated all year for time spent relaxing, entertaining or getting things done.

    Jawbone Jambox Wireless Speaker

    $199 retail (far cheaper online). The bigger version goes for $299.

    The cool-looking rechargeable wireless speaker is getting good reviews for its big, balanced sound and compact design. It lets you stream music from smartphones, laptops and other Bluetooth devices(设备).

    Chalkboard Wall Planter

    $129. 95 retail at Williams-Sonoma

    No need to make room indoors for more flower pots. Grow a herb garden indoors in a wall-fixed vertical planter, and you'll get the benefits of fragrance (芳香). Fill the 10 planting cells with the herbs of your choice, and hang the planter in a sunny spot. Use the chalkboard borders to label each plant. Measures 16 by 5 by 24 inches and weighs 11 pounds.

    Pocket Projector

    $299 retail at Brookstone

    Let everyone get a good look at the pictures on your smartphone, computer, video player, or digital camera. This rechargeable pocket projector can turn a flat surface into a 60-inch big screen with 1080p HD picture quality. Invite friends for a movie night or a presentation. An HDMI cable is included to connect it to your device.

    Adjustable Tablet Stand

    $159 at Sharper Image

    This is the gift for the person who enjoys mobile. Use it to keep your hands free while doing homework, crafts or writing out bills. It can be rotated through 360 degrees. The stand slides easily under your furniture and can be used on either side of a bed or a sofa. It also folds for storage.

Growing up in poverty in rural Kenya,Nelly Cheboi watched her single mother work tirelessly so she could attend school. 

From an early age,she realized that her family,along with others like hers in their village, was1 a cycle that left them little hope. Cheboi attended college.2 a scholarship in the United States,worked odd jobs to support her family,and discovered her3 for computer science. She4 the success in finding jobs to her computer literacy. She knew she wanted to share it with her5 back home. 

Today,she's giving 4,000 kids the chance for a6 future through her nonprofit, TechLit Africa. The organization uses recycled7 to create technology labs in schools in rural Kenya. 

In 2018,she began8 recycled computers. She started small,carrying the machines to Kenya and9 customs fees and taxes herself. TechLit Africa now works with shipping companies to10 the donated computers so it's more cost11 . The donated hardware is12 to partner schools in rural Kenya,where students aged 4 to 12 receive daily classes and13 opportunities from professionals and gain skills that will help improve their education and prepare them for future jobs. 

"My hope is that when the first TechLit kids graduate from high school,they're able to get a job online14 they will know how to code,"Cheboi said. "The world is your oyster when you are educated. By bringing the resources,by bringing these skills,we are15 the world to them. "