At one time, computers were expected largely to remove the need for paper copies of documents(文件) because they could be stored electronically. But for all the texts that are written, stored and sent electronically, a lot of them are still ending up on paper.

    It is difficult to measure the quantity of paper used as a result of use of Internet-connected computers, although just about anyone who works in an office can tell you that when e-mail is introduced, the printers start working overtime. “I feel in my bones this revolution is causing more trees to be cut down ,” says Ted Smith of the Earth Village Organization.

    Perhaps the best sign of how computer and Internet use pushes up demand for paper comes from the high-tech industry itself, which sees printing as one of its most promising new markets. Several Internet companies have been set up to help small businesses print quality documents from a computer. Earlier this week Hewlett-Packard Co. announced a plan to develop new technologies that will enable people to print even more so they can get a hard copy of a business document, a medical record or just a one-line e-mail, even if they are nowhere near a computer. As the company sees it, the more use of the Internet the greater demand for printers.

    Does all this mean environmental concerns have been forgotten? Some activists suggest people have been led to believe that a lot of dangers to the environment have gone away.

    “I guess people believe that the problem is taken care of, because of recycling,” said Kelly Quirke, director of the Rainforest Action Network in San Francisco. Yet Quirke is hopeful that high-tech may also prove helpful. He says printers that print on both sides are growing in popularity.

    The action group has also found acceptable paper made from materials other than wood, such as agricultural waste.

    Women are friendly. They often share with others. But men are more competitive. They are trying to improve their social status. Why? Researchers have found it's all due to the hormone oxytocin (荷尔蒙催生素). Although known as the love hormone, it affects the sexes differently.

    Generally, people believe that the hormone oxytocin is let out in our body in various social situations and our body creates a large amount of it when falling in love or giving birth.

    But in a former experiment Professor Ryan found that the hormone is also let out in our body during a negative situation such as envy (嫉妒).

    Further researches showed that in men the hormone oxytocin improves the ability to recognize competitive relations, but in women it raises the ability to recognize friendship.

    Professor Ryan's recent experiment used 62 men and women aged 20 to 37.

    Half of the participants (参与者) received oxytocin. The other half received placebo (安慰剂).

    After a week, the two groups switched with participants. They went through the same steps with the other material.

    Following each treatment, they were shown some video pictures with different social behavior. Then they were asked to analyze the relations by answering some questions. The questions were about telling friendship from competition. And their answers should be based on gestures, body language and facial expressions.

    The results showed that, after treatment with oxytocin, men's ability to correctly recognize competitive relations improved, but in women it was the ability to correctly recognize friendship that got better.

    Professor Ryan thus concluded, “Our experiment proves that the hormone oxytocin can raise people's abilities to better tell apart different social behaviors.”

    Four years ago, we asked ourselves: what if we could create a shopping experience with no waiting in lines and no checkout? Or could we create a physical store where customers could simply take what they want and go? Our answer to those questions is Amazon Go, where you could experience the idea of "just walk out shopping".

    Amazon Go is a new kind of store with no checkout required. We created the world's most advanced shopping technology, so you never have to wait in line. With our "just walk out shopping" experience, simply use the Amazon Go app to enter the store, take the products you want, and go! No lines, no checkout.

    Our checkout-free shopping experience is made possible by the same types of technologies used in self-driving cars: computer vision, sensor fusion, and deep learning. Our “ just walk out technology ” automatically detects when products are taken from or returned to the shelves and keeps track of them in your virtual cart. When you have done shopping, you can just leave the store. Shortly after, we'll charge your Amazon account and send you a receipt.

    We offer delicious ready-to-eat breakfast, lunch, dinner, and snack options made fresh every day by our on-site chefs and favorite local kitchens and bakeries. Our selection of food stuff ranges from bread and milk to cheeses and locally made chocolates. You'll find well-known brands we love, plus special finds we're excited to introduce to customers. For a quick home-cooked dinner, pick up one of our chef-designed Amazon Meal Kits, and you can make a meal for two in about 30 minutes.

    Our 1,800-square-foot shopping space is conveniently compact, so busy customers can get in and out fast. It is located at 2131, 7th Ave, Seattle, WA, on the corner of 7th Avenue and Blanchard Street. All you need is an Amazon account, a supported smart phone, and the free Amazon Go app.

    Amazon Go is currently only open to Amazon employees in our testing program, and will be open to the public soon.

    I study English literature at university and have always been proud of Britain's literary heritage（文学遗产）. Some British authors that you may have heard of are Charles Dickens and Jane Austen. These writers are famous all over the world because their books have been translated into many different languages. In the UK, their novels are celebrated as some of the best that have ever been written. We say that these novels are “classic” because they are still read and enjoyed years after their publication.

    I read classic novels because they are part of my university lessons but also because I enjoy them. They can teach you a lot about how people used to live and what society was like in the past. Novels like Hard Times by Charles Dickens remind us of the poverty in London during the Industrial Revolution while Jane Austen's fiction shows us what family life was like in the 18th century.

    Classic novels usually have memorable stories land interesting characters. One of my favourite books is Charles Dickens Great Expectations. It is about a boy called Pip who suddenly receives a lot of money from a mysterious supporter. As he grows up, his character changes: he becomes quite selfish and mean. Another important character is Miss Havisham. When she was young, her fiancé ran away on their wedding day. She lives in a dark house and still wears her wedding dress. She is a fascinating character, both sad and scary.

    Reading classic novels enriches my knowledge and life experience. And it has become part of life.

The best places to see giant pandas are, of course, in Chengdu, hometown of giant pandas. But there are zoos/parks in other China cities where you can see giant pandas if you can't get to Chengdu.

Dujiangyan Panda Base

● Location: Dujiangyan Prefecture, 67 km (41 mi) or 

● 1.5 hours from Chengdu

● Pandas: about 20

● Activities: panda viewing, and panda keeper program

● Suitable for: those who want a less-crowded panda base or to join in a one-day volunteer program

● Time needed: half a day

Dujiangyan Panda Base focuses on breeding, wilderness training, and releasing pandas into the wild.

Only 1.5 hours from Chengdu, it is the most easily-accessible panda base offering a panda keeper program.

Wolong Panda Base

● Location: 121 km (175 mi) west of Chengdu, 3 hours' driving

● Pandas: about30

● Activities: seeing pandas, panda keeper program, hiking in wild panda habitat

● Best for: taking part in a volunteer program in a peaceful environment

● Time needed: 2 days

Compared with Dujiangyan, Wolong Panda Base is much further away from Chengdu. Thus, it is less frequented by visitors. Besides, Wolong National Nature Reserve is considered to be the real hometown of wild pandas.

Chongqing Zoo

● Location: Chongqing City, conveniently on subway line 2

● Pandas: about 16

● Activities: Seeing pandas only

● Time needed: 2 hours

● Best for: travelers who visit Chongqing or take a Yangtze Cruise

Chongqing Zoo boasts 16 pandas, which is second to Chengdu Giant Panda Breeding Center among the city zoos. Located in the "Mountain City", Chongqing Zoo is built on the mountain slopes. The panda house utilizes the mountainside and includes a rock cave. So, you have to climb up a little for a panda visit there.

Like reading? Interested in Chinese classical novels? Have a look at the following four books which are we known to most Chinese as Four Masterpieces.

The Water Margin

The Water Margin, also known as All Men Are Brothers in Pearl Buck's translation, Shui Hu Zhuan in Chinese, is along chapter novel with the Song Jiang Uprising in the late Northern Song Dynasty as the main background and type of heroic legend. It is an immortal (不朽的) novel and has inspired many storytellers. The author of the novel is generally regarded as Shi Nai'an (1296~1371).

Romance of the Three Kingdoms

Romance of the Three Kingdoms is the first full-length historical romance novel in China. Its author is Luo Guan zhong (about 1330~1400), a famous novelist in the late Yuan Dynasty and the early Ming Dynasty. Characters such as Liu Bei, Cao Cao, Guan Yu, Zhang Fei and Zhuge Liang have become household names among the Chinese.

Journey to the West

Journey to the West is the first romantic chapter novel about gods and devils in ancient China. There are 100 copies of Journey to the Westin the existing Ming Publications without the author's signature. Wu Yuxuan, a scholar of the Qing Dynasty, first proposed that the author of Journey to the West was Wu Cheng'en (1500~1582) of the Ming Dynasty.

The Dream of the Red Chamber

The Dream of the Red Chamber, also called The Story of the Stone, is said to be the greatest masterpiece of Chinese fiction. It is generally believed to be written by Cao Xueqin (about 1715~1763), a writer of the Qing Dynasty. With hundreds of persons and their stories, the story is very complex but also very interesting for its encyclopedic character(百科全书式的人物).