Rainforests, it turns out, are not created equal. Take the Amazon rainforest, an area that covers about 7 million square kilometers. But within that huge expanse are all kinds of ecological zones, and some of these zones, says Greg Asner, are a lot more crowded than others.

    “Some forests have many species of trees,” he said, “others have few. Many forests are unique from others in terms of their overall species composition…” And all of these different small areas of forest exist within the giant space that is the Amazon Rainforest.

    So Asner, using the signature technique called airborne laser-guided imaging spectroscopy, began to map these different zones from the air. “By mapping the traits of tropical forests from above,” he explains, “we are, for the first time, able to understand how forest composition varies geographically.”

    The results show up in multicolored maps, with each color representing different kinds of species, different kinds of trees, the different kinds of chemical they are producing and using, and even the amount of biodiversity, the animal and plant species that live within each zone.

    Armed with this information, Asner says decision-makers now have “a first-time way to decide whether any given forest geography is protected well enough or not. If not, then new protections can be put in place to save a given forest from destruction.”

    Asner says the information is a great way for decision-makers to develop a “cost-benefit ratio type analysis.”  Conservation efforts can be expensive, so armed with this information, government leaders can ensure they are making the most of their conservation dollars by focusing on areas that are the most biologically diverse or unique.

    The next step, Asner says, is to take his project global, and to put his eyes even higher in the sky, on orbital satellites. “The technique we developed and applied to map Peru is ready to go global.” Asner said. “We want to put the required instrumentation on an Earth-orbiting satellite, to map the planet every month, which will give the best possible view of how the world's biodiversity is changing, and where to put much needed protections.

    What's your favorite type of music? Most people may prefer rock and roll, pop or jazz. These types are most publicized by television and the radio. Country music now would seem to mistakenly belong to the category of rock or pop. Publicity of this category started to drop only after the year 2000; however, it did have its peak years just before falling down.

    What people may not know is that this type of music inspired(促成) rock and roll especially with one of the most important figures in music history-Elvis Presley-who is known as the 6/King of Rock and Roll". Elvis used to be very famous at a radio program which broadcast country music back in the late 1940- s.  Country music is influenced by jazz and blues. Rock music is also influenced by jazz and blues so that they may even seem similar.

    Nowadays, country music is closely related to pop music due to artists' preference and popular demand. Starting from the 1980's it slowly divided itself into New and Old Country Music. Legends like Johnny Cash began to slip away because the new understanding of country music actually contains pop and his music just doesn't fit the category. Fortunately, country music is still heavily promoted through websites and reviews.

    Certain types of music nowadays are linked with different age groups. Classical for the people in the mid 19th century, pop in the 1920's, and then there's country music.

    All these types continue to grow and modernize while still appealing to certain age groups. More modern country music compositions tend to become different in their own ways which makes it even harder to identify them as country music while they, again, remain appealing only to certain age groups. Active promoters of country music videos, however, seem to appeal to a large number of age groups especially those active in Australia, for as long as country music isn't mixed with other types, it will eventually regain its charm as music for all ages.

    Think plants are just boring green things that you use for food and decoration? Think again! Plants are able to do some pretty awesome things that you're probably totally unaware of.

    Researchers have discovered that plants have the ability to communicate with an underground network made up of fungus (真菌) , which serves the plants in many ways. Tomato plants use the fungus web to warn each other of their own unhealthy conditions. Trees connected through the fungus network could move nutrients (养分) to and from each other. It is believed that larger trees move nutrients to smaller ones to help them to survive.

    Not only that, but they can also damage unwelcome plants by spreading poisonous chemicals through the fungus. It sounds like the plant world had the Internet before we did.

    Some plants have a rather impressive line of defense against being eaten. When sensing they are being swallowed, they give off a chemical into the air that attracts the insect's natural enemy. The enemy attacks the bug, thus saving the plants. This is basically the plant kingdom version of getting your older brother to beat up that kid who steals your lunch money.

    You might be aware that humans and animals have an internal clock. But did you know that plants also have this clock? This means they can prepare for certain times of day just like we do. Is it because they can react to light at sunrise? In a study, scientists found that plants use the sugars they produce to keep time, which help to regulate the genes responsible for the plant's own internal clock. So, in a sense, wake up with petunias (矮牵牛) is just as valid as ―wake up with the chickens.

    Nature is full of surprises. So for those of you who didn't know the wonders of plants, now you do.

    It was December 25, 1914, only 5 months into World War I. German, British, and French soldiers, already sick and tired of the senseless killing, disobeyed their superiors and started socializing with "the enemy" along two-thirds of the Western Front.

    German troops held up Christmas trees with signs, "Merry Christmas". Thousands of troops ran across the battlefields covered with dead bodies. They sang Christmas songs, exchanged photographs of loved ones back home, shared food and even played football. Soldiers hugged men they had been trying to kill a few short hours before. They agreed to warn each other if their officers forced them to fire their weapons, and to aim high.

    Fear ran through the military leaders on both sides. They felt that their power was being challenged: soldiers declaring their brotherhood with each other and refusing to fight. Generals declared this unexpected peacemaking illegal and said that participating soldiers would face a military court. Those found guilty would be imprisoned or even shot. By March 1915 the socializing movement had been destroyed and the killing machine was back in full operation. Over the next three years more than fifteen million people died in the war.

    Not many people have heard the story of the Christmas Truce (休战). On Christmas Day, 1988, a local radio host in Boston played "Christmas in the Trenches", a song about the Christmas Truce several times and was stunned by his listeners' response. Thousands of people called in, praising the song, with many moved to tears by the amazing events it described.

    You can probably guess why the callers were in tears. The Christmas Truce story goes against most of what we have been taught about people. It lets us see the world as it can be and says, "This really happened once." It shows us the potential we have as humans contradicts all of those TV and newspaper stories that tell us how mean and heartless people are. It is like hearing that our deepest wishes really are true: the world really can be different.

Are you a moviegoer? If, like me, you're a fan of film, then there's no better place to watch something than on the big screen at the cinema. You enter the dark theatre and take your seat, ready to be entertained. But while you are absorbed in some movie magic, many others are now getting their film fixed at home.

Over the last few years, cinemas have seen a comeback. Customers have been attracted by comfortable seats, and lots of choice of things to watch. Multiplexes in particular can screen up to twenty films at the same time, suiting all different tastes. In addition, 3D and even 4D movies can give the audience an extra immersive experience. So what's not to like about a trip to the cinema?

The coronavirus pandemic has put the future of cinema under the spotlight. Some have had to close because of reduced ticket sales. In the UK, it's brought about a surge in TV watching and online streaming. It's reported that half of UK adults will keep and continue using their new streaming subscriptions.

This isn't great news for cinemas. They rely on the release of a big blockbuster to bring the crowds back, but the launch of new films, such as James Bond: No Time To Die, are being delayed. Disney has released its $200m blockbuster, Mulan, online instead of in movie theatres. John Fithian, from the National Association of Theatre Owners, told Variety magazine: This idea of waiting out the pandemic to make your movies more profitable doesn't make sense to me. There won't be as much of an industry left to play your movies in if you do that. "

Hope is the most powerful motivational force that helps people to overcome adversities. {#blank#}1{#/blank#}, you need a guiding force to keep you moving toward your goals. Hope keeps you on your feet and makes you much stronger. 

Hope is your strength and inner faith in the battle of your life. {#blank#}2{#/blank#}, you lose everything. You do hard work and make a great effort to succeed in life but fail. That makes you upset and depressed. You do not know what to do. At that time hope comes to your rescue and gives you encouragement. {#blank#}3{#/blank#}.

Hope increases the productivity, efficiency and creativity in people. A hopeful person who stays positive and enthusiastic can succeed in any field of his choice. {#blank#}4{#/blank#}. The best service we can do to people is giving hope to the hopeless. 

{#blank#}5{#/blank#}? Yes, hope gives meaning to life as without hope there is no reason to live. Give hope to people and they will become more creative and more productive. Hope is vital to the life of every person. Besides, hope is necessary not only for life but also for living a healthy life. Hope is the best medicine that keeps away miserable tension, depression, high blood pressure and other health problems. I had two big heart attacks and while at the edge of death, I had hope that I would survive. And the hope of getting well kept me alive.

A. A hopeless person is a failed person who can never succeed in life

B. Have you ever lost hope and felt sorry for yourself

C. Since you're full of hope for the future

D. You try one more time and succeed

E. In the ups and downs of life

F. Is hope necessary for life

G. If you lose hope