Ever since humans lived on the earth,they have made use{#blank#}1{#/blank#}various forms of communication.In general,the major form of expressing thoughts and feelings{#blank#}2{#/blank#}(be) spoken language.{#blank#}3{#/blank#}there is a language barrier, communication is completed through body language.Smile is the most universal{#blank#}4{#/blank#}(face) expression,which shows happiness and puts people a ease.But sometimes,it is likely to hide other feelings,like{#blank#}5{#/blank#}(angry) and worry.There {#blank#}6{#/blank#}(be) different ways to greet someone in different countries.People from Columbia like approaching others and kiss them on{#blank#}7{#/blank#}cheek.In France,if adults meet people they know,they can kiss each other twice on each cheek. Being polite to others is{#blank#}8{#/blank#}(object),but we'd better not give a hug to a person with higher rank.Body language is {#blank#}9{#/blank#}(real) complex, so we should study international customs{#blank#}10{#/blank#}(avoid) difficulties in today's world of cultural crossroads.

    To Be Joyful, To Be Young

    What really works to make sustainable changes in diet and lifestyle? It's probably not what you think. In the past 30 years of conducting clinical research, I {#blank#}1{#/blank#}(learn) that real keys are pleasure, joy and freedom. Joy of living is sustainable; fear of dying is not.

    Why? Because life is to be enjoyed. There's no point {#blank#}2{#/blank#}(abandon) something you enjoy unless you get something back that's even better, and quickly. When people eat more healthfully, {#blank#}3{#/blank#}(quit) smoking, and manage stress better, they find they feel so much better, so quickly. It reconstructs the reason for making these changes from fear of dying to joy of living.

    When you exercise and eat right, your brain receives more blood flow and oxygen, so you become smarter, have more energy, and need less sleep. Two studies showed just walking for three hours per week for only three months caused so many neurons(神经细胞) {#blank#}4{#/blank#}(grow) that it actually increased the size of people's brains!

    Your face receives more blood flow, so your skin glows more and wrinkles less. You look younger and more attractive. In contrast, an unhealthy diet, lasting emotional stress and smoking reduce blood flow to your face {#blank#}5{#/blank#}you age more quickly. Smoking speeds up aging because nicotine contributes to your blood vessel becoming narrower, {#blank#}6{#/blank#}decreases blood flow to your face and makes it wrinkle prematurely. This is why smokers look years older than they really are.

    One of the most interesting findings was that the mothers' awareness of stress was more important than {#blank#}7{#/blank#}was objectively occurring in their lives. {#blank#}8{#/blank#}(give) a questionnaire, the women were asked to rate on a three-point scale how stressed they felt each day. The women who realized they were under heavy stress had significantly shortened and damaged telomeres(染色体端粒) compared with {#blank#}9{#/blank#}who felt more relaxed. Contrarily, some of the women who felt relaxed {#blank#}10{#/blank#}raising a disabled child had more normal-appearing telomeres.

In other words, if you feel stressed, you are stressed.

    Have you ever wondered{#blank#}1{#/blank#}children always seem to have bas of energy and never run out of steam? Researchers have discovered that children have levels of recovery of endurance athletes. In fact, scientists say children's muscles recover from "high-intensity exercise" a lot {#blank#}2{#/blank#}(quick)than athletes. A study looked at the performance levels of children when they were cycling, and compared their fitness to {#blank#}3{#/blank#} of athletes. Rwsearcher Dr Sebastien Ratel suggested they{#blank#}4{#/blank#}(find)the children used more of their aerobic metabolism and were therefore less tired during the high-intensity physical activities. The children also recovered very quickly—even faster than the well-trained adult endurance athletes.

    The researchers hope that{#blank#}5{#/blank#}(they)finding will help scientists have a better {#blank#}6{#/blank#}(understand) of how the human body changes with age. It could lead to advantages in the fight{#blank#}7{#/blank#}diabetes and other diseases. Dr Ratel said the research was{#blank#}8{#/blank#}(particular)important as more children were become less active. He warned." With the diseases related to physical inactivity{#blank#}9{#/blank#}(rise), know the changes with growth that might contribute to the risk of disease."{#blank#}10{#/blank#}is helpful for children to maintain their fitness as they grow up and play as much as they could so they renin healthy as adults.