Much meaning can be conveyed, clearly, with our eyes, so it is often said that eyes can speak.

    Do you have such kind of experience? In a bus you may look at a stranger, but not too long. And if he is sensing that he is being stared at, he may feel uncomfortable.

    The same in daily life. If you are looked at for more than necessary, you will look at yourself up and down, to see if there is anything wrong with you. If nothing goes wrong, you will feel angry toward others' stare at you that way. Eyes do speak, right?

    Looking too long at someone may seem to be rude and aggressive. But things are different when it comes to stare at the opposite sex. If a man glances at a woman for more than 10 seconds and refuses to move his gaze, his intentions are obvious, that is, he wishes to attract her attention, to make her understand that he is admiring her.

    However, the normal eye contact for two people engaged in conversation is that the speaker will only look at the listener from time to time, in order to make sure that the listener does pay attention to what the former is speaking, to tell him that he is attentive.

    If a speaker looks at you continuously when speaking, as if he tries to dominate you, you will feel uncomfortable. A poor liar usually exposes himself by looking too long at the victim, since he believes in the false idea that to look straight in the eye is a sign of honest communication. Quite the contrary.

    In fact, continuous eye contact is confined to lovers only, who will enjoy looking at each other tenderly for a long time, to show affection that words cannot express.

    Evidently, eye contact should be done according to the relationship between two people and the specific situation.

    Last year，I was on a plane with my friend, waiting for it to take off．The pilot's voice was heard throughout the plane “Sorry for the delay, ladies and gentlemen. Our engines don't work．We are going to jump-start them．Once we get them going, we'll get up in the air and see what happens．"

    That was all he said．"See what happens. Shouldn't we have had a better plan than that？"At that point, I could only laugh nervously. One woman started crying, “OH，no! We are going to crash!”. There are signs of desperation and anxiety, and we hadn't even taken off yet．

    The pilot even seemed unhappy．He told us one engine was working double time and his plan was to get up in the air and see what happens! Then we did．We got up in the air，and what happened？

    Nothing．We arrived in Norfolk, and no sooner had the wheels touched down than applause burst out as everyone on the airplane breathed a sigh of relief．

    All too often, people stop achieving their goals just because they don't have a guaranteed result．But success will never be guaranteed. The best thing that you can do is to just get up in the air and see what happens．

    If your aim is to build a business, then get up in the air and see what happens! Don't give yourself all the reasons why you can't．Do not wait until you have everything you need．You never will．

    If your goal is to start a friendship，say"Hello",get up in the air and see what happens! The results could be very rewarding．If your goal is to learn a new skill, get up in the air and see what happens! It might not be as difficult as you think．It could be fun!

    There is an English saying that “Laughter is the best medicine.” Until recently, few people took the saying seriously. Now, however, doctors have begun to look into laughter and the effects it has on the human body. They have found that laughter can really improve people's health.

    Tests were carried out to study the effects of laughter on the body. People watched funny films while doctors checked their hearts, blood pressure, breathing and muscles. It was found that laughter has similar effects to physical exercise. It increases blood pressure, makes the heart beat quicker and makes people breathe deeper; it also works on several groups of muscles in the face, the stomach, and even the feet. If laughter exercises the body, it must be beneficial(有益的).

Other tests have shown that laughter appears to be able to reduce the effects of pain on the body. In one experiment doctors produced pain in groups of students who listened to different radio programs. The group that tolerated（忍耐）the pain for the longest time was the group which listened to a funny program. The reason why laughter can reduce pain seems to be that it helps to produce a kind of chemical in the brain which diminishes both stress and pain.

    As a result of these discoveries, some doctors in the United States now hold laughter clinics(诊所), in which they help to improve their patients' condition by encouraging them to laugh. They have found that even if their patients do not really feel like laughing, making them smile is enough to produce beneficial effects similar to those caused by laughter.

    I start every summer with the best of intentions: to attack one big book from the past, a classic that I was supposed to have read when young and ambitious. Often the pairings of books and settings have been purely unthinking: "Moby Dick" on a three-day cross-country train trip: “The Magic Mountain” in a New England beachside cottage with no locks on the doors, no telephones or televisions in the rooms, and little to do beyond row on the salt pond. Attempting "The Man Without Qualities" on a return to Hawaii, my hometown, however, was less fruitful: I made it through one and a quarter volumes (册), then decided that I'd got the point and went swimming instead.

    But this summer I find myself at a loss. I'm not quite interested in Balzac, say, or “Tristram Shandy.” There's always War and Peace, which I've covered some distance several times, only to get bogged down in the "War" part, set it aside for a while, and realize that I have to start over from the beginning again, having forgotten everyone's name and social rank. How appealing to simply fall back on a favorite once more into “The Waves” or “Justine,” which feels almost like cheating, too exciting and too much fun to properly belong in serious literature.

    And then there's Stendhal's “The Red and the Black,” which happens to be the name of my favorite cocktail of the summer, created by Michael Cecconi at Savoy and BackForty. It is easy to drink, and knocking back three or four seems like such a delightful idea. Cecconi's theory: "I take whatever's fresh at the green market and turn it into liquid." The result is a pure shot of afternoon in the park, making one feel cheerful and peaceful all at once, lying on uncut grass with eyes shut, sun beating through the lids…

    A person can use all five senses while spending time with dolphins. We can see them play in the waves, hear them call, and feel their skin. Dolphins can sense you, too, but not in all the same ways. They have good eyesight, for example, but no sense of smell. Sensory biologists try to understand connections between animal behaviors and the senses. One team of these scientists recently made an unexpected discovery about certain dolphins.

    The researchers found that Guiana dolphins can detect electric fields, an ability that may help them find fish to eat. The secret to this newly found sense, say the scientists, is hidden in the dolphins' snouts (口鼻部).

    "We were really surprised to find this in the dolphin. Nobody had expected it," said Wolf Hanke, who led the new dolphin study.

    Hanke and his team suspected the dolphin's electro－sense might have something to do with small dimples (酒窝) on the animal's snout. "We thought they must have some functions," Hank said. To find out for certain, his team studied two Guiana dolphins.

    The scientists first studied the dimples of a 29－year－old dolphin that had died of natural causes. Under a microscope, the dimples looked familiar: they were similar to the sensors used by other animals to detect electric fields.

    Next, Hanke and his team tested a live dolphin, a 28－year－old named Paco, to see if he could recognize an electric field. They taught Paco to swim close to a device that could create a weak electric field in the water. Then the team taught Paco to swim away from the device if he detected any changes. When the scientists created an electric field, Paco swam away—showing that he knew something had changed. When there was no electric field, Paco stayed there. When Paco's snout was covered in plastic, he didn't react to the electric field.

    Paco's behavior told the scientists that the dolphin used his snout to detect the tiny electric field. "This is a major breakthrough," Peter Madsen, a sensory biologist, said.

    Any foreigner who has tried to learn Chinese can tell how hard it is to master the tones required to speak and understand. And anyone who has tried to learn to play the violin or other instruments can report similar challenges.

    Now researchers have found that people with musical training have an easier time learning Chinese. Writing in the online edition of Nature Neuroscience, researchers from Northwestern University say that both skills draw on the same parts of the brain that help people discover changes in pitch(音调).

    One of the study's authors, Nina Kraus, said the findings suggested that studying music "actually tunes our sensory system". This means that schools that want children to do well in languages should hesitate before cutting music programs, Dr. Kraus said. She said music training might also help children with language problems.

    Mandarin(普通话)speakers have been shown to have a more complex encoding(编码) of pitch patterns in their brains than English speakers do. This is because in Mandarin and other Asian languages, pitch plays a central role. A single­syllable word can have several meanings depending on how it is intoned.

    For this study, the researchers looked at 20 non­Chinese speaking volunteers, half with no musical background and half who have studied an instrument for at least six years.

    As they were shown a movie, the volunteers also heard an audio tape of the Mandarin word "mi" in three of its meanings: squint, bewilder and rice. The researchers recorded activities in their brain stems to see how well they were processing the sounds. Those with a music background showed much more brain activities in response to the Chinese sounds.

    The lead author of the study, Patrick C.M. Wong, said it might work both ways. It appears that native speakers of tonal languages may do better at learning instruments.