While we all try to find happiness, sometimes we still end up feeling low. While most people can control this feeling, low moods can stay with some, leading to depression. About 322 million people suffered from depression in 2015, according to a report by the World Health Organization in February. This is more than 4 percent of the world's population.

    Depression is described by the WHO as a mental disorder. It has several symptoms including sadness, loss of interest and feelings of low self-worth. In severe cases, depression may even lead to suicide.

    The number of people living with depression is increasing. The WHO reported a rise of 18.4 percent between 2005 and 2015. Young people are a group known to suffer with depression. “The pressures on today's youth are like no other generation, perhaps,” Dan Chisholm, an official of WHO, told Reuters.

    In China, depression among young people is on the rise, Zhu Zhuohong, a psychology professor with the Chinese Academy of Sciences, told Xinhua News Agency. Competition to outperform others, especially in education, can cause a lot of pressure for Chinese youth.

    Almost 1.2 million Chinese people aged 15 to 24 suffer from depression, according to a report released by British science journal The Lancet in May.

    Luckily, more and more efforts are being made to deal with this problem. This year's World Health Day, held on April 7, will focus on depression. The day will highlight (强调) the “Depression: let's talk” campaign. The campaign aims to make sure that people with depression both seek and get help.

    Years ago, I lived in a building in a large city. The next building was only a few feet away from mine. There was a woman who lived there, whom I had never met, yet I could see her seated by her window each afternoon, sewing or reading.

    After several months had gone by, I began to notice that her window was dirty. Everything was unclear through the dirty window. I would say to myself, “I wonder why that woman doesn't wash her window. It really looks terrible.”

    One bright morning I decided to clean my flat, including washing the window on the inside.Late in the afternoon when I finished the cleaning, I sat down by the window with a cup of coffee for a rest. What a surprise! Across the way, the woman sitting by her window was clearly visible. Her window was clean!

    Then it dawned on me. I had been criticizing her dirty window, but all the time I was watching hers through my own dirty window.That was quite an important lesson for me. How often had I looked at and criticized others through the dirty window of my heart, through my own shortcomings?

    Since then, whenever I wanted to judge someone, I asked myself first, “Am I looking at him through my own dirty window?” I try to clean the window of my own world so that I may see the world about me more clearly.

    Palaces are known for their beauty and splendor, but they offer little protection against attacks. It is easy to defend a fortress (堡垒),but fortresses are not designed with the comfort of a king or queen in mind. When it comes to structures that are both majestic and well-defended, the classic European castle is the best example of design. Across the ages castles changed, developed, and eventually fell out of use, but they still command the fascination of our culture.

    Castles were originally built in England by Norman invaders. In 1066. As William the Conqueror advanced through England, he defended key positions to secure the land he had taken. The castles he built allowed the Norman lords to draw back to safety when threatened by English rebellion. Castles also served as bases of operation for offensive attacks. Troops were summoned to（召集）, organized around, and deployed (部署) from castles. In this way castles served both offensive and defensive roles in military operations.

    Not limited to military purposes, castles also served as offices from which the lord would administer control over his kingdom. That is to say, the lord of the land would hold court in his castle. Those that were socially beneath the lord would come to report the affairs of the lands that they governed and pay tribute to the lord. They would address conflicts, handle business, feast, and enjoy festivities, In this way castles served as important social centers in medieval England. Castles also served as symbols of power. Built on important and noticeable sites overlooking the surrounding areas, castles constantly appeared in the background of many peasants' lives and served as a daily reminder of the lords strength.

    Now, castles no longer serve their original purposes. However, the remaining castles receive millions of visitors each year from those who wish to experience the glory of a time long passed.

    Love working with children? Looking for an exciting new opportunity? Want to work on a friendly, fun and supportive team? This is what our team member Anna says about working at My Crèche:

    "It's the nicest place I've ever worked. Everyone is so friendly and we have so much fun working together. They give me opportunities to learn new things every day. They care about my personal development. Working at My Crèche has enabled me to build relationships with the children as well as parents within the community which makes me feel so welcomed in the local area."

    Conveniently located in the heart of crouch End, London, N8, My Crèche offers drop-in and pre-booked childcare for children aged 6 weeks to 5 years of age. We also provide after-school and breakfast clubs for children up to 8 years old. Our goal is to enable parents to pursue personal and professional activities when they need to, with total peace of mind knowing their children are being cared for in a safe and fun environment.

    We are looking for an enthusiastic and committed professional with excellent interpersonal skills, who is committed to ensuring the best outcomes and care for children. This is an excellent opportunity for a proactive individual to be a part of a fresh and progressive childcare concept and we welcome newly qualified professionals. We are a small and very supportive team with great training opportunities.

    The successful candidate will:

    Have a certificate Level 3 in Childcare and Education.

    Have experience working with children.

    Be an excellent communicator with strong people skills.

    Be energetic and able to multi-task.

    Salary:£16,500—£19,000 per year depending on experience and qualifications.

    Full time(flexible work available) and 28 days annual leave.

    American high school students are terrible writers, and one education reform group thinks it has an answer: robots. Or, more accurately, robot-readers—computers programmed to scan students' essays and spit out a grade.

    Mark Shermis, professor of the College of Education at the University of Akron, is helping to hold a contest, set up by the William and Flora Hewlett Foundation (WFHF), which promises $ 100,000 in prize money to programmers who write the best automated grading software. "If you're a high school teacher and you give a writing task, you're walking home with 150 essays," Shermis said. "You're going to need some help."

    Automated essay grading was first proposed in the 1960s, but computers back then were not up to the task. In the late 1990s, as technology improved, several textbooks and testing companies jumped into the field. Today, computers are used to grade essays on South Dakota's student writing assessments and a handful of other exams, including the TOEFL test of English fluency, taken by foreign students.

    The Hewlett contest aims to show that computers can grade as well as English teachers—only much more quickly and without all that depressing red ink. "Automated essay scoring is objective," Shermis said. "And it can be done immediately. If students finish an essay at 10 pm, they will get a result at 10: 01 pm."

    Take, for instance, the Intelligent Essay Assessor, a web-based tool marketed by Pearson Education, Inc. Within seconds, it can analyze an essay for spelling, grammar, organization, and help students to make revisions. The program scans for key words and analyzes semantic (语义的) patterns, and Pearson claims that it can understand the meaning of text much the same as a human reader.

    You may have heard that humans only use ten percent of their brain, and that if you could unlock the rest of your brainpower, you could do so much more. You could become a super genius, or acquire psychic powers like mind reading.

    This "ten-percent myth" has inspired many references in the cultural imagination. In the 2014 movie Lucy, for example, a woman develops godlike powers thanks to drugs that release the previously inaccessible 90 percent of her brain.

    Contrary to the ten-percent myth, however, scientists have shown that humans use their entire brain throughout each day.

    Over the years, brain scientists have shown that different parts of the brain are responsible for specific functions, whether it's recognizing colors or problem solving. Contrary to the ten-percent myth, scientists have proven that every part of the brain is integral for our daily functioning.

    Research has yet to find a brain area that is completely inactive. Even studies that measure activity at the level of single neurons(神经元) have not revealed any inactive areas of the brain.

    Many brain imaging studies that measure brain activity when a person is doing a specific task show how different parts of the brain work together. For example, while you are reading this text on your smartphone, some parts of your brain, including those responsible for vision and reading comprehension, will be more active.

    A more direct counter to the ten-percent myth lies in individuals who have suffered brain damage – like through a stroke(中风)– and what they can no longer do, or do as well, as a result of that damage. If the ten percent myth is true, then damage too many parts of our brain shouldn't affect your daily functioning. Studies have shown that damaging a very small part of the brain may have devastating consequences.

    If someone experiences damage to Broca's area(布罗卡氏区), for example, they can understand language but can't speak fluently.

    In one highly publicized case, a woman in Florida permanently lost her" capacity for thoughts, perceptions, memories, and emotions that are the very essence of being human" when a lack of oxygen destroyed half of her brain.