When it comes to the Internet, people talk about the password most. Actually, it's been under fire for a long time. Research has shown that passwords are not a very good way to protect sensitive information.

    People would use some random characters, numbers and symbols. Furthermore, a unique password would be used for every site or application the user uses. Unfortunately, the longer and more complex passwords become, the more people are likely to forger them. Therefore, they use the same password for every service or application. These are all big no-noes and essentially defeat the purpose of a password.

    Google is trying to kill off passwords on Android devices by introducing the Trust API, which does what simple passwords cannot and gives developers a framework for securing their application using a number of security systems and metrics(衡量标准)on the device. A Trust Score will be generated based on a number of metrics including your device location, face scanning, fingerprints, and the things like your typing speed or the way you speak. Taken one at a time, these metrics are not secure. But taken together, these metrics will help recognize the real “you”.

    The good news is that Google has already been testing this on real world data. Google has proven the Trust API works. Next Google will run tests will some banks to see if the Trust API meets their needs before rolling out the system on Android phones later. It may take another year for apps and popular sites to start using the Trust API.

    This is a pretty exciting change. Passwords have been around for a lone time. Although the security of systems has been improved, the usability of systems hasn't been proved much. Google appears to have the best of them. Maybe that never-ending conflict between security and convenience will be able to take a break once the Trust system comes out.

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    One hot night last July, when our new baby wouldn't or couldn't sleep,I tried everything I could think of: a warm bottle,songs,gentle rocking.Nothing would settle him.Guessing that I had a long night ahead of me,I brought a portable TV into his room,figuring that watching the late movie was as good a way as any to kill the hours till dawn. To my surprise,as soon as the TV lit up,the baby quieted right down,his little eyes focused brightly on the tube.Not to waste an opportunity for sleep,I then tiptoes（踮着脚走）out of the room,leaving him to watch the actors celebrate John Bellushi's forty-fifth birthday.

    My wife and I heard none of the baby that night,and the next morning when I went into his room,I found that he was still watching TV himself.

    I found in my baby's behavior a symbol of the new generation.My wife and I had given him some books to examine,but he merely spit upon them.When we read to him,he did not feel comfortable.And so it is in the schools. We find that our students don't read and that they look down upon reading and scold those of us who teach it.All that they want to do is to watch TV.After this experience with the baby,however,I have come to a conclusion:"Let them watch it!"If television is that much more attractive to children than books,why should we fight about it?Let them watch it all that they want!

    No matter where you live or how you define yourself, these are some of the best activities to get in touch with nature.

Hiking

    One of the easiest and most accessible ways to get close to nature is by setting out on a good old hike. Hiking generally doesn't require any special equipment or special skills; just a good pair of boots, a map, and a thirst for adventure. This activity can be as relaxing as you make it. Suggestion: consider doing a little advance research on Trails.com or EveryTrail.com.

    Backcountry Camping

    Why limit yourself to just a day hike when you can have a full weekend (or longer) adventure? Backcountry camping involves packing your tent, sleeping bag, food，and water on your back to set up camp in a remote location. If you're an experienced hiker and camper, this is an excellent way to test your survival skills and explore the wildness. Many parks require backpackers to obtain permits, so make sure to register and map your route before stepping on the trail.

    Mountain and Road Biking

    Unlike long hikes through the woods, biking allows you to cover more ground and travel farther while still being in nature. Mountain biking typically involves riding up and down steep slopes, between trees, and over rocks. If this sounds too intense or your tires aren't suited for a rocky path, consider taking a road bike or a hybrid on paved trails through forest preserves or along country roads.

    Worldwide, the most people willing to return your mobile phone if you've lost it are to be found in Slovenia, and the fewest in Malaysia. This finding is the result of an interesting study in 32 of the world's largest cities. Altogether, researchers 'lost' 960 new mobile phones. They got back 654 of them，or 68 percent. Prague came in at number eight. There, 23 out of 30 people who were willing to return the mobile phone.

    It wasn't a traditional study. Two researchers carefully chose different places such as areas with high crime(犯罪)and busy downtown shopping areas, to “lose” the phones. When one of the researchers dropped a phone, the other would keep watching from a distance. The honest finders tried their best to find the owner with the help of the address book in the phone. They were told why the study was done and asked why they acted the way they did.

    It was found that the busier the place where the researchers dropped the phone, the greater the chance of it being returned. Another interesting finding was that women were generally more likely than men to return the phone. Researchers also found that most people still have a sense of honesty. “Crime is simply not good behavior (行为), ”said an expert. “People want to trust others, and want to be trusted.”

    We know that many animals do not stay in one place. Birds, fish and other animals move from one place to another at a certain time. They move for different reasons: most of them move to find food more easily, but others move to get away from places that are too crowded.

    When cold weather comes, many birds move to warmer places to find food. Some fishes give birth in warm water and move to cold water to feed. The most famous migration(迁移) is probably the migration of the fish, which is called “salmon”. This fish is born in fresh water but it travels many miles to salt water. There it spends its life. When it is old, it returns to its birthplace in fresh water. Then it gives birth and dies there. In northern Europe, there is a kind of mouse. They leave their mountain homes when they become too crowded. They move down to the low land. Sometimes they move all the way to the seaside, and many of them are killed when they fall into the sea.

    Recently, scientists have studied the migration of a kind of lobster(龙虾). Every year, when the season of bad weather arrives, the lobster get into a long line and start to walk across the floor of the ocean. Nobody knows why they do this, and nobody knows where they go.

    So, sometimes we know why humans and animals move from one place to another, but at other times we don't. Maybe living things just like travel.

    The most popular martial arts (武术)today came from Asia, especially China. Some Chinese fighting styles were invented more than 3, 000 years ago. Many martial arts were invented because people needed to defend themselves or protect others. Nowadays, people learn martial arts as a way of keeping fit or as a competitive sport, but they are still very useful for selfdefence (防卫).

     Martial arts are often referred to as either soft or hard. These terms imply a way of dealing with your opponent's (对手的)force. Soft martial arts, such as tai chi, teach you to use your opponent's own force to defend yourself. Soft styles use movements and timing to avoid, deflect and redirect their opponent's attacks (攻击). These martial arts are soft for the defender but not for the attacker! On the other hand, hard styles, such as kung fu, teach you to defend yourself using force. Techniques involve blocking, posturing and powerful punching and kicking. Hard martial arts techniques are more effective(有效的)if you are more skillful, more powerful and faster than your opponent.

    Perhaps one of the best known Japanese martial arts today is karate. But did you know that it came from Fujian Province? in the century, a community of Chinese migrants(移民)from Fujian settled (定居)in what was then the kingdom of Okinawa. The Chinese migrants used to gather in a park to .enjoy cultural activities — one of which was kung fu. This soon caught the attention of local youths, who started learning kung fu from their Chinese neighbours.

    In fact, Chinese influence in martial arts was not only kung fu. The very first Korean military (军事)training manual was based on a Chinese version. During the Japanese invasion (侵略)of Korea in the 16th century, the Korean army needed an effective way to train a large number of soldiers. They used a training methodology from a Chinese military manual called ji xiao xin shu, written by the famous Chinese general, Qi Jiguang, who had himself defeated Japanese army.