Many years ago, people relied on the sun, the moon and stars to find their way around. Later, the compass was introduced. And now, we have satnav（卫星导航）systems to guide us. A satnav system uses groups of satellites to show the user's location. They send information to a receiver, such as a smart phone, to show us where we are.

    The earliest built satnav system is the Global Positioning System, which belongs to the US. Then there is Russia's Global Navigation（导航）Satellite System, the European Union's Galileo and China's own satellite navigation system, BeiDou.

    On October 14, 2017, an ARJ21-700 plane, which was the first domestically-produced jet equipped with the BeiDou navigation system, successfully completed a test flight. The results showed the performance of the system developed by China matches that of similar systems produced abroad, according to the Commercial Aircraft Corporation of China.

    Since its introduction in 2000, the Beidou navigation system has seen increasing numbers of applications linked to everyday life, from shared bikes to farming.

    When it comes to shared bikes, smart locks that support BeiDou chips offer more accurate positioning than others, making it easier to find a bike.

    Farmers can use BeiDou-enabled tractors to plow（犁）the soil and use unmanned aircraft with BeiDou to sow seeds, which can improve efficiency and make better use of resources. BeiDou's farming applications have spread from Heilongjiang province to Beijing, Liaoning, Shanxi, Hubei and other regions across China.

    With its many uses, the Beidou navigation system is even playing a big role in the Belt and Road Initiative（— 带—路）. “To date, the BeiDou system has covered most parts of the Asia-Pacific region, as well as counties along the Silk Road Economic Belt and the 21^st Century Maritime Silk Road” said Yang Changfeng, Chief designer of the BeiDou system.

    Today, there are more than 20 BeiDou satellites above our heads, and China plans to launch even more this year to expand the BeiDou network to better serve the Belt and Road Initiative.

    “As BeiDou expands its overseas reach, it will be increasingly popular in the logistics （物流）industry,” said Miao Qianjun, secretary-general of the navigation services association. “Ships, for example, can use it to position themselves while sailing across oceans to European countries, no longer limited to Southeast Asian regions in the near future.”

    “To another little girl.”

    That's what 3-year-old Ariana of Winterport, Maine, said when her father Josh Smith asked where her donated (捐赠的) hair was going to go. It was then that the dad of two realized his young daughter had a heart that was too big for words.

    “I run a charity called Extra Life where I play video games to help raise money for kids,” he said. “Ariana happened to be sitting next to me when a video was playing, showing a little girl who was bald(秃顶的), lying in a hospital bed with tubes in her.” When their daughter got curious, Smith and his wife Crystal explained how medicine was what made the child in the video lose her hair.

    “Without a second thought, Ariana said, 'She can have some of my hair,'” Smith said. “That's when my wife told me that there are many organizations that we could donate it to.” The Smiths chose “Locks of Love” to send Ariana's generous gift to a child with medical hair loss.

    A week later, Ariana was taken to the family hairdresser where 10 inches was cut from her hair.

    “It was her first haircut,” Smith told ABC News. “She can be so selfless like that. Her first reaction is 'How about me giving up something that I have, so a little girl can feel pretty?'” Smith posted his daughter's moving gesture on his personal webpage, where it has received almost 645,000 views in just two days.

    “She'll take an adult-like approach and it's really amazing,” Smith said. “She is just a little kid, but if she sees somebody in need, she certainly cares for them. This made Ariana feel special and she'd definitely like to do it again.”

    Does your local high school have a student newspaper? Only 1 in 8 of New York's public high schools has student newspapers – and many of those are published just a few times a year. A few more are online, which can leave out poorer schools.

    Rebecca Dwarka, an 18-year-old senior who works for her student paper said, “Facebook is the new way of finding out what happened. Nobody wants to actually sit down and read a whole article about it. This makes a 'whole article' sound a little like a long sentence in lonely places.”

    I am not nostalgic about high school student newspapers and never worked for mine. I put out what was then called a personal magazine with a group of friends because we wanted to write about peace, war and rock 'n' roll without school officials warning us not to make jokes about the local officials.

    School newspapers are in decline because students now find out what happened on social networking websites. This is a little discouraging because it proves that for millions of Americans, journalism is becoming a do-it-yourself thing. Every citizen can be a reporter.

    When something happens, we look for social media messages. Facebook posts and Tweets have become the means by which citizens and reporters can prove, deny, pass on stories and express opinions without the press' challenging, researching or slowing the message.

    But truly good journalism is a craft, not just a blog post. It requires seeing something carefully and it uses an eye for details to help prove a larger view. And even journalism that conveys an opinion tries to be fair. If school newspapers begin to disappear, I hope there are other ways for students to learn that.

    Canterbury College

    COURSE A

    This course will enable students to experience performing arts and the media at a basic level. It will give them the experience to decide if they wish to develop an interest in this field and to train their potential and adaptability for working in a performance company in either a performing or a technical role.

    COURSE B

    The aim of this course is to provide a series of training in business-related skills and a comprehensive knowledge of business practice. It is for students with a business learning experience who can manage a heavy workload.

    COURSE C

    This course gives a foundation for a career in caring for children, the elderly or people with special needs. Core units are Emergency Treatment, Communication and Information Technology. Practical training is an important part of the course.

    COURSE D

    This course is designed to provide an introduction to the construction industry. Units covered include Heat, Light and Sound, Introduction to the Urban Environment, Communication Processes and Techniques. All students will complete vocational assignments with work experience in the big companies.

    COURSE E

    The qualifications gained and the skills developed on this course will provide a good basis for gaining employment in office work. In addition to word processing, the course also covers spreadsheets, computerized accounting, databases and desktop publishing. All students are given chances to develop their confidence, and advice and information is given on job search skills, presentation techniques and personal appearance.

    COURSE F

    This course is designed to provide a foundation in graphic and visual communication skills. Students complete units in picture composition and photographic processing alongside elements of graphic design, and gain hands-on experience of desktop publishing and presentations.

    "Opinion" is a word that is used carelessly today. It is used to refer to matters of taste, belief, and judgment. This inaccurate use would probably cause little confusion if people didn't attach too much importance to opinion. Unfortunately, most attach great importance to it. "I have as much right to my opinion as you to yours,'' and "Everyone's entitled to his opinion,'' are common expressions. In fact, anyone who would challenge another's opinion is likely to be branded intolerant.

    Is that label accurate? Is it intolerant to challenge another's opinion? It depends on what definition of opinion you have in mind. For example, you may ask a friend "What do you think of the new Ford cars?" And he may reply, "In my opinion, they're ugly." In this case, it would not only be intolerant to challenge his statement, but foolish. For it's obvious that by opinion he means his personal preference, a matter of taste. And as the old saying goes, "It's pointless to argue about matters of taste."

    But consider this very different use of the term. A newspaper reports that the Supreme Court has delivered its opinion in a controversial case. Obviously the justices did not share their personal preferences, their mere likes and dislikes. They stated their considered judgment, painstakingly arrived at after thorough inquiry and deliberation(审议).

    Most of what is referred to as opinion falls somewhere between these two extremes. It is not an expression of taste. Nor is it careful judgment. Yet it may contain elements of both. It is a view or belief more or less inaccurately arrived at, with or without examining the evidence.

    Is everyone entitled to his opinion? Of course, this is not only permitted, but guaranteed. We are free to act on our opinions only so long as, in doing so, we do not harm others.

    "A bird with a broken wing will never fly as high. " I'm sure T. J, Ware was made to feel this way almost every day in school.

    By high school, T, J. was the most celebrated troublemaker in his town. Teachers literally cringed when they saw his name posted on their classroom lists.

    I met T. J. for the first time when all the students at school were attending ACE training. At first, he showed no interest in the discussion. But slowly, the interactive games drew him in. T. J. had some brilliant thoughts on those situations, which were welcomed by his group. By the end of the activity, the other students on the team were impressed with his concern and ideas and elected T. J. co-chairman of the team.

    When T. J. showed up at school on Monday morning, a group of teachers were expressing their disagreements to the school principal about his being elected co-chairman. The principal reminded them that the purpose of the program was to uncover any positive feeling and strengthen its practice until true change can take place. The teachers left the meeting, firmly convinced that failure was unavoidable.

    Two weeks later, T. J. and his friends led a group of 70 students to collect food They collected a school record: 2,854 cans of food in just two hours. The local newspaper covered the event with a full-page article the next day. That newspaper story was posted on the main bulletin board at school, where everyone could see it. 

    T. J. ,s picture was up there for doing something great.

    T. J. started showing up at school every day and answered questions from teachers for the first time.  The event he started now yields 9,000 cans of food in one day, taking care of 70 percent of the need for food for one year.

    T, J. reminds us that a bird with a broken wing only needs mending.  But once it has healed, it can fly higher than the rest. T. J. got a job. He became productive. He is flying quite nicely these days.