Most book reviews start with a headingthat includes all the basic information about the book, like:

Title.

Author.

Place of publication, publisher, date ofpublication.

Number of pages.

    Like most pieces of writing, the review usually begins with an introduction that lets your readers know what the review will say. The first paragraph usually includes the author and title again, so your readers don't have to look up to find this information. You should also include a very brief description of the contents of the book, the purpose or audience for the book, and your reaction and evaluation.

Then you move into a section of background information that helps place the book in context and discuss escriteria (准则）for judging the book. Next, the review gives a summary of the main points of the book, quoting and explaining key phrases from the author. Finally, you get tothe heart of your review – your evaluation of the book. In this section, you might discuss some of the following issues:

how well the book has achieved its goal

what possibilities are suggested by the book

what the book has left out

how the book compares with others on the subject

what specific points are not convincing

what personal experiences you've hadrelated to the subject.

    It is important to use labels to carefully distinguish your views from the author's, so that you don't confuse your reader.

    Then, like other essays, you can endwith a direct comment on the book, and tie together issues raised in the reviewin a conclusion.

    There is, of course, no set form, but ageneral rule is that the first one–half to two–thirds of the review should summarize the author's main ideas and at least one–third should evaluate thebook.

    You may know about “junk food” like French fries. But do you know about “junk sleep”?

    Recently, a British survey found that electronic(电子的) products in teenagers bedrooms are affecting(影响)their sleep.

    The survey was done among 1,000 British kids from 12 to 16. It found that 30 percent of them got just 4 to 7 hours sleep every day. But doctors say they need 8 to 9 hours.

    Almost a quarter of the kids said they fell asleep more than once a week while watching TV, listening to music or using other electronic products.

    “This is very worrying.” said Dr Chris Idzikowski, a British expert, “We call it 'junk sleep', it means you don't get enough sleep and the quality of the sleep is bad, too. If you don't get good rest, you don't perform well in school the next day.”

    The survey found that 40 percent of the kids felt tired each day, with girls between 13 and 16 feeling the worst. Nearly all the teenagers have a phone, Mp4 or TV in their bedroom. And many of them have all three.

    Throughout history scientists have risked their health and their lives in their search for the truth.

    Sir Issac Newton, the seventeenth century scientist was very smart, but that didn't stop him from doing some pretty stupid things. In his laboratory in Cambridge, he often did the strangest experiments. Once, while testing how light passes through lenses (晶状体), he put a long needle into his eye, pushed it to the back, and then moved it around just to see what would happen. Luckily, there was no lasting bad effect. On another occasion, he stared at the sun, for as long as he could bear, to discover what effect this would have on his sight. To escape suffering permanent damage, he had to spend some days in a dark room before his eyes recovered.

    In the 1750s, the Swedish chemist Karl Scheele, was the first person to find a way to produce phosphorus (磷) He, in fact, discovered eight more chemical elements, including Chlorine (氯), though he didn't get any place for them. He was a very clever scientist, but he had a strange habit of tasting a little of every substance he studied. This risky practice finally caught up with him. In 1786, he was found dead in his laboratory, surrounded by a large number of dangerous chemicals, any of which might have been responsible for his death.

    Eugene Shoemaker was a respected geologist, he spent a large part of his life studying craters (陨石坑), and how they were formed, and later the research into the comments of the plane Jupiter. In 1997, he and his wife were in the Australian desert, where they went every year search for places where comets (彗星) might have hit the earth. While driving in the Tanam desert, one of the most open places in the world, another vehicle rushed into them, and Shoe maker died on the spot. Some of his ashes (骨灰) were sent to the moon by the Lunar Prospect or, a spacecraft, and he is the only person who has this honor.

    The fence was long and high. He put the brush into the whitewash and moved it along the top of the fence. He repeated the operation. He felt he could not continue and sat down.

    He knew that his friends would arrive soon with all kinds of interesting plans for the day. They would walk past him and laugh. They would make jokes about his having to work on a beautiful summer Saturday. The thought burned him like fire.

    He put his hand into his pockets and took out all that he owned. Perhaps he could find some way to pay someone to do the whitewashing for him. But there was nothing of value in his pockets-nothing that could buy even half an hour of freedom. So he put the bits of toys back into his pockets and gave up the idea.

    At this dark and hopeless moment, a wonderful idea came to him. It filled his mind with a great, bright light. Calmly he picked up the brush and started again to whitewash.

    While Tom was working, Ben Rogers appeared. Ben was eating an apple as he walked along the street. As he walked along it, he was making noises like the sound of a riverboat. First he shouted loudly, like a boat captain. Then he said "Ding—Dong-Dong", "Ding—Dong— Dong" again and again, like the bell of a riverboat. And he made other strange noises. When he came close to Tom, he stopped.

    Tom went on whitewashing. He did not look at Ben. Ben stared a moment and then said: "Hello! I'm going swimming, but you can't go, can you? "

    No answer. Tom moved his brush carefully along the fence and looked at the result with the eye of an artist. Ben came nearer. Tom's mouth watered for the apple, but he kept on working.

    Ben said, "Hello, old fellow, you've got to work, hey?"

    Tom turned suddenly and said, "Why, it's you, Ben! I wasn't noticing."

    "Say—I'm going swimming. Don't you wish you could? But of course you'd rather work—wouldn't you? Of course you would."

    Tom looked at the boy a bit, and said, "What do you call work?"

    "Why, isn't that work?"

    Tom went back to his whitewashing, and answered carelessly.

    "Well, maybe it is, and maybe it isn't. All I know is, it suits Tom Sawyer."

    "Oh come, now, you don't mean to say that you like it?

    The brush continued to move.

    "Like it? Well, I don't see why I shouldn't like it. Does a boy get a chance to whitewash a fence every day?"

    Ben stopped eating his apple. Tom moved his brush back and forth, stepped back to look at the result, added a touch here and there, and stepped back again. Ben watched every move and got more and more interested. Soon he said, "Say, Tom, let me whitewash a little."

    Tom thought for a moment, and was about to agree, but he changed his mind.

    "No-no-it won't do, Ben. You see, Aunt Polly wants this fence to be perfect. It has got to be done very carefully. I don't think there is one boy in a thousand, maybe two thousand, that can do it well enough."

    "No——is that so? Oh come, now——let me just try. Only just a little."

    "Ben, I'd like to, but if it isn't done right, I'm afraid Aunt Polly …"

    "Oh, I'll be careful. Now let me try. Say—I'll give you the core of my apple."

    "Well, here—No, Ben, now don't. I'm afraid …"

    "I'll give you all of it."

    Tom gave up the brush with unwillingness on his face, but joy in his heart. And while Ben worked at the fence in the hot sun, Tom sat under a tree, eating the apple, and planning how to get more help. There were enough boys. Each one came to laugh, but remained to whitewash. By the time Ben was tired, Tom sold the next chance to Billy for a kite; and when Billy was tired, Johnny bought it for a dead rat——and so on, hour after hour. And when the middle of the afternoon came, Tom had won many treasures.

    And he had not worked. He had had a nice idle time all the time, with plenty of company, and the fence had been whitewashed three times. If he hadn't run out of whitewash, Tom would have owned everything belonging to his friends.

    He had discovered a great law of human action, namely, that in order to make a man or a boy want a thing, it is only necessary to make the thing difficult to get.

    The Eiffel Tower is very famous in France. It is visited by 7 million visitors a year. The Eiffel Tower was designed by Gustave Eiffel in the late 19th century. On Monday, March 31st, 2019, it turned 130.

    The look of the Eiffel Tower is greatly loved by people today, but things were different when the design was first shown to the public. Many French artists thought that the design was ugly. However, Eiffel did not change a thing. He believed that once it was completed, people in Paris and visitors around the world would love the tower. He was certainly right.

    The tower became popular with the public as soon as it opened on March 31st, 1889, two years after the construction began. Over 3,000 people came to look at this new tower and even made the effort to climb the 1,710 stairs to the top. The 984-foot-tall Chrysler Building in New York City beat it.

    Today, the tower houses a number of restaurants on its first and second levels. The third level has been turned into a vast platform (平台). From there visitors can see the entire city of Paris. While visitors are allowed to take the stairs to the first two levels, the platform can only be got to by taking the elevators.

    To ensure that the “Iron Lady” always looks good, the tower is cleaned and repainted every eight years. It's an effort that takes a team of 25 workers, an entire year. If you travel to Paris one day, don't miss it, the excellent achievement.

Extreme athletes have been using wingsuits (翼装) to fly for many years. However, the pull of gravity makes it impossible to speed up or fly higher. To push past the limitations, Peter Salzmann teamed up with German car maker BMW. The result is an electrified wingsuit, which allows flyers to rise to higher altitudes at the speed of up to 186 miles per hour!

The 33-year-old professional wingsuit pilot first thought of creating the design in 2017, "At the time, I was developing suits for skydiving with a friend," he explains. "One evening after a day of testing, we threw out lots of ideas about how we could improve performance. One of them was a supporting motor-and it's an idea I just couldn't shake off. I found the idea of being able to jump from my local mountain wearing the wingsuit and land in my garden exciting."

To help with the process, Salzmann reached out to the experts at BMW's Designworks Studio. It took the team three years and multiple test jumps to perfect the design. The result is an updated version of wingsuit with two 5-inch propellers (螺旋桨), Powered by a battery, the propellers can be controlled using an on/off switch and even stopped mid-flight using the emergency button, if the flyer encounters an airplane or a flock of birds.

On November 6, 2020, Salzmann, wearing his hi-tech suit, leaped from a helicopter from an altitude of 10,000 feet to soar around the mountain peaks. The expert pilot fired up the electric motors and rocketed forward, gliding above four mountain peaks. The task completed, the pilot opened his parachute (降落伞) and gently landed.

It is unclear if Salzmann and BMW plan to make the electrified wingsuits available to the general public. But, one can always hope!