One evening after dinner, Mr. and Mrs. Tisich called a family meeting. —We've had to make a difficult decision, Mr. Tisich announced. —You see, your mother has been offered a post as co-director of a television station in Chicago. Unfortunately, the station is not here. After thinking long and hard about it, we've concluded that the right decision is to move to Chicago.

    Marc looked shocked, while his sister Rachel breathlessly started asking when they'd be moving. —It's surprising, but exciting! she said. Marc simply said, —We can't go—I can't leave all my friends. I'd rather stay here and live with Tommy Lyons!

    The Tisichs hoped that by the time they moved in August, Marc would grow more used to the idea of leaving. However, he showed no signs of accepting the news, refusing to pack his belongings.

    When the morning of the move arrived, Marc was nowhere to be found. His parents called Tommy Lyon's house, but Mrs. Lyons said she hadn't seen Marc. Mrs. Tisich became increasingly concerned, while her husband felt angry with their son for behaving so irresponsibly.

    What they didn't know was that Marc had started walking over to Tommy's house, with a faint idea of hiding in Lyons's attic(阁楼) for a few days. But something happened on the way as Marc walked past all the familiar landscape of the neighborhood: the fence that he and his mother painted, the tree that he and his sister used to climb, and the park where he and his father often took evening walks together. How much would these mean without his family? Who make them special in the first place? Marc didn't take the time to answer that question but instead hurried back to his house, wondering if there were any moving cartons(纸板箱) the right size to hold his record collection.

    In the fall of 1985, I was a bright-eyed girl heading off to Howard University to study law, aiming at a legal career and dreaming of sitting on a Supreme Court bench somewhere. Twenty-one years later I am still a bright-eyed dreamer and one with quite a different tale to tell.

    My grandma, an amazing woman, graduated from college at the age of 65. She was the first in our family to reach that goal. But one year after I started college, she developed cancer. I made the choice to withdraw from college to care for her. It meant that school and my personal dream would have to wait.

    Then I got married with another dream: building my family with a combination of adopt and biological children. In 1999, we adopted our first son. To lay eyes on him was fantastic and very emotional. A year later came our second adopted boy. Then followed son No.3. In 2003, I gave birth to another boy.

    You can imagine how busy I became, raising four boys under the age of 8. Our home was a complete zoo--a joyous zoo. Not surprisingly, I never did make it back to college full-time. But I never gave up on the dream either. I had only one choice: to find a way. That meant taking as few as one class each semester.

    The hardest part was feeling guilty about the time I spent away from the boys. They often wanted me to stay home with them. There certainly were times I wanted to quit, but I knew I should set an example for them to follow through the rest of their lives.

    In 2007, I graduated from the University of North Carolina. It took me over 21 years to get my college degree!

    I am not special, just single-minded. It always struck me that when you're looking at a big challenge from the outside it looks huge, but when you're in the midst of it, it just seems normal. Everything you want won't arrive in your life on one day. It's a process. Remember: little steps add up to big dreams.

    Sharing E Umbrella, a new umbrella sharing company based in Shenzhen, China, recently announced that it had lost most of the 300,000 umbrellas since it set up.

    China's sharing economy has been growing rapidly, with companies offering anything from bicycles and basketballs to phone batteries for people to rent. Customers make a small deposit（押金）and get to use the thing for a daily cost, with a fine put in place for every day if they fail to return the product in time. It's a simple business model, and market data shows that people see sharing as a cheap and convenient way to cut down waste.

    Zhao Shuping founded the Sharing E Umbrella, an umbrella sharing service, in April. By the end of June, he had already started in 11 major Chinese cities, including Shanghai, Nanjing and Guangzhou. While picking up the umbrellas was simple, as they were made available（可得到的）at bus and subway stations, the return system turned out to be a different matter. “Umbrellas are different from bicycles,” Mr. Zhao told Chinese news site thepaper.cn. “Bikes can be parked anywhere, but with an umbrella you need something to hang it on.”

    So instead of bothering to return the umbrellas back to a station, a lot of people just took them home, and Sharing E Umbrella has reportedly lost track of most of the 300,000 umbrellas. Considering that borrowing umbrellas requires a 19 yuan deposit, with a fee of 0.50 yuan per half an hour usage, Zhao says that he suffers a loss of 60 yuan per lost umbrella, so the company is now in the red, but he is not ready to stop it just yet. Zhao announces that Sharing E Umbrella still plans to roll out（推出）30 million nationwide by the end of the year.

    One of the most important ways to learn and master the English language is to read, read, and read. It is said that a good reader is also a good writer and a good speaker. However, in today's world, reading is something that most children dislike doing.

    There are simply so many distractions (分心的事物) that books, magazines, and newspapers are often ignored and they are in favor of video games and movies. And while video games and movies also play a role in helping the child learn the English language, they still can't quite compare to reading.

    And as a result, kids are learning less and less. Take a look at an elementary level text book. You'll notice that the books for elementary students are filled with pictures and colors. Those pictures and colors in the elementary level text books aren't there just for the sake (缘由) of design. Colors and pictures make us more engaged in the act of learning grammar. They catch our attention and help us retain (保留) more of what we read. This is especially true for little children who enjoy fun English.

    Children are quite easily distracted. When you ask them to sit down and read quietly, their minds will often wander and it won't take long before you find them doodling (涂鸦) and not doing what you told them to do. But if a book is colourful enough to catch a kid's attention, then you'll have a better chance at getting the kid to sit down long enough to learn English.

    The same principle holds true for interactivity (互动). Like colors and pictures, interactive reading materials like English songs for kids also get the child engaged in what he or she is learning. Interactive reading materials get the child to focus since using them is almost like playing.

    Measles (麻疹), which once killed 450 children each year and disabled even more, was nearly wiped out in the United States 14 years ago by the universal use of the MMR vaccine (疫苗). But the disease is making a comeback, caused by a growing anti-vaccine movement and misinformation that is spreading quickly. Already this year, 115 measles cases have been reported in the USA, compared with 189 for all of last year.

    The numbers might sound small, but they are the leading edge of a dangerous trend. When vaccination rates are very high, as they still are in the nation as a whole, everyone is protected. This is called "herd immunity", which protects the people who get hurt easily, including those who can't be vaccinated for medical reasons, babies too young to get vaccinated and people on whom the vaccine doesn't work.

    But herd immunity works only when nearly the whole herd joins in. When some refuse vaccination and seek a free ride, immunity breaks down and everyone is in even bigger danger. That's exactly what is happening in small neighborhoods around the country from Orange County, California, where 22 measles cases were reported this month, to Brooklyn, N.Y., where a 17-year-old caused an outbreak last year.

    The resistance to vaccine has continued for decades, and it is driven by a real but very small risk. Those who refuse to take that risk selfishly make others suffer.

    Making things worse are state laws that make it too easy to opt out (决定不参加) of what are supposed to be required vaccines for all children entering kindergarten. Seventeen states allow parents to get an exemption (豁免), sometimes just by signing a paper saying they personally object to a vaccine.

    Now, several states are moving to tighten laws by adding new regulations for opting out. But no one does enough to limit exemptions. Parents ought to be able to opt out only for limited medical or religious reasons. But personal opinions? Not good enough. Everyone enjoys the life-saving benefits vaccines provide, but they'll exist only as long as everyone shares in the risks.

    City trees grow faster and die younger than trees in rural forestry, a new study finds. Over their lifetimes, then, urban trees will likely absorb less CO₂ from the air than forest trees.

    As we all know, the earth would be freezing or burning hot without CO₂. However, CO₂ is a greenhouse gas, meaning it traps energy from the sun as/heat. That makes temperatures near the ground rise. Human activities, especially the widespread burning-of fossil(化石)fuels, have been sending extra greenhouse gases into the air. This has led to a rise in average temperatures across the globe.

    Studies had shown forests readily absorb CO₂, but there hadn't been much data on whether city trees grow, die and absorb CO₂ at the same rate as forest trees do. So some researchers decided to find out.

    To figure out how quickly trees were growing, researchers tracked their diameters (the width of their trunks) between 2005 and 2014. A tree's diameter increases as it grows, just as a person's waist size increases as they gain weight. About half the weight of a tree is carbon, research has shown. Most of the rest is water. Over the nine years' tracking, the researchers found city trees absorbed four times as much carbon from the air as forest trees. However, they were twice as likely to die. So over the lifetime of each type of tree, forest trees actually absorbed more CO₂.

    City trees grew faster because they had less competition for light from their neighbors. In a forest，trees tend to grow close together，shading their neighbors. Street trees also benefit from higher levels of nitrogen (氮)in rainwater. Nitrogen helps plants grow. Waste gases from gas-burning cars also contain nitrogen, thus enriching city air with nitrogen. Later, rainwater may wash much of it to the ground. Some street trees may also have better access to water than trees in the country because the underground water pipes can leak.