Quicker and faster 3-D printers have allowed not just amazing objects to be created, but have started to affect how doctors treat patients.

    We've put together a list of some of the most amazingmedical break throughs made possible with 3-D printing.

Life-Saving Airway

    In 2013, doctors created a new airway for kaiba Gionfriddo, aboy born with an airway that kept collapsing (萎陷). To save his life doctors printed tiny tubes to join together in different shapes and sizes until one finally worked for Kaiba. It was placed in Kaiba's bronchus (支气管) so that it no longer collapsed. Even more remarkably, once the plant was placed it couldstay there. It's designed to eventually be absorbed into the body.

New “Bionic” Hands

    One of the most remarkable ways 3-D printing is now being used is as a way to create prosthetics (假肢). A boy born without an arm named Alex was able to get a new“bionic”hand thanks to it. Last year a college student spent 8 weeks coming up with a special prosthetic design that only cost a few hundred dollars in materials. He said he wanted to create a prosthetic far cheaper than other choices that can run tens of thousands of dollars.

A practice Heart

    In Seattle, doctors have been able to use 3-D printing technology to“practice”risky operations so that they will face fewer surprises in the operating room. Kami Sutton was born with her heart“in the wrong place”. For a recent operation her doctor was able to take many scans of Sutton's heart and print out a model. “Kami's heart is truly one-of-a-kind,”Dr. Stephan Seslar, a heart disease specialist said. “Operating on her without understanding the structure of her heart better could be very dangerous.”

A New Skull

    A U.K. man was able to have part of his skull rebuilt thanks toa 3-D printer. Stephen Power broke his cheek bones in a crash. To help Powerh is doctors instead created 3-D bones all carefully printed in the shape of his face. “This is really the first time we've taken it to this stage, where everything has been planned and modeled in advance — and worked sweetly,”said Adrian Sugar, a doctor.

    Many people think of guys as being carefree when it comes to their appearance. But in fact, a lot of guys spend plenty of time in front of the mirror. They care just as much as girls do about their body image.

    Body image is a person's opinions and feelings about his or her own body and physical appearance{#blank#}1{#/blank#}You appreciate your body for its capabilities and accept its imperfections.

    {#blank#}2{#/blank#} Here are some ideas.

    Recognize your strengths. Different body types are good for different things. What does your body do well? Maybe your speed, strength, or coordination makes you better than others at a certain sport. That may be basketball, table tennis, mountain hiking, dancing, or even running. Or perhaps you have non-sports skills, like drawing, painting singing, playing a musical instrument, writing, or acting{#blank#}3{#/blank#}

    Exercise regularly. Exercise can help you look well and feel about yourself. Good physiques (体形) don't just happed{#blank#}4{#/blank#}A healthy habit can be as simple as exercising 20 minutes to I Hour three days a week. Working out can also lift your spirits.

    Respect your body. Practicing good habits-regular showering; taking care of your teeth, hair, and skin; wearing clean clothes, and so on—can help you build a positive body image.

    {#blank#}5{#/blank#} Your body is just one part of who you are. Your talent for comedy a quick wit (智慧), and all the other things make you unique. So try not to let small imperfections take over.

A. Be yourself.

B. Just explore talents that you feel good about.

C. They take hard work, regular workouts, and a healthy diet.

D. So, what can you do to develop a positive body image?

E. Use this as an opportunity to discover what you're good at.

F. The good news is that self-image and body image can be changed.

G Having a positive body image means feeling satisfied with the way you look.

How to Make Friends

    Friendship is a very important human relationship and everyone needs good friends.  Good friendship has many benefits.  It offers companionship, improves self-worth and promotes good health.  There are times in our lives such as when we have recently moved into a new town, or changed our jobs or schools.  Such changes often leaves us without a friend. {#blank#}1{#/blank#} But for many of us the process is difficult and requires courage.  Below are some helpful suggestions on how to make and keep friends.

    ⒈Associate with others.

    The first step to make friends is associating with other people.  You can go to public places to meet new people.  Besides, you will need to make yourself known by becoming an active member of such places.

    ⒉Start a conversation

    Starting a conversation is the second most important step in making new friends. {#blank#}2{#/blank#}You can always start the conversation.  Being able to make small talk is a very useful skill in relating with other people. 

    ⒊{#blank#}3{#/blank#}

    Choosing friends with common interests is important in building friendship as these interests would always bring you and your friend together. Hanging out will always be a pleasant experience.

   ⒋Let it grow.

    It is a good thing to stay in touch.  However, try not to press your new friend with calls, messages or visits as this would likely wear him or her out and finally you may lose your friend. {#blank#}4{#/blank#}.  The best friendships are the ones that grow naturally.

    ⒌Enjoy your friendship

    The best way to enjoy your friendship is to allow your friends to be themselves. {#blank#}5{#/blank#}Try not to change them from who they are to what you want them to be.  Become the kind of friend you will want your friend to be to you.

A. Be cheerful.

B. Do things together.

C. Do not wait to be spoken to.

D. Try not to find fault with your friends.

E. Making new friends comes easily to some people.

F. For a friendship to develop you need to stay in touch.

G. So you will need to give your friend time to react to you.

    Our society is generally becoming one of giant enterprises directed by a bureaucratic management in which man becomes a small, well-oiled cog in the machinery. The oiling is done with higher wages, Nell-ventilated factories and piped music, and by psychologists and "human-relations" experts; yet all this oiling does not alter the fact that man has become powerless, that he is bored with it. In fact, the blue and the white-collar workers have become economic puppets who dance to the tune of automated machines and bureaucratic management.

    The worker and employee are anxious, not only because they might find themselves out of a job; they are anxious also because they are unable to acquire any real satisfaction of interesting life. They live and die without ever having confronted the fundamental realities of human existence as emotionally and intellectually independent and productive human beings.

    Those higher up on the social ladder are no less anxious. Their lives are no less empty than those of their subordinates. They are even more insecure in some respects. They are in a highly competitive race. To be promoted or to fall behind is not a matter of salary but even more a matter of self-respect. When they apply for their first job, they are tested for intelligence as well as for the right mixture of obedience and independence. From the moment on they are tested again and again—by the psychologists, for whom testing is a big business, and by their superiors, who judge their behavior, sociability, capacity to get along, etc. This constant need to prove that one is as good as or better than one's fellow competitor creates constant anxiety and stress, the very causes of unhappiness and illness.

    Am I suggesting that we should return to the preindustrial mode of production or to nineteenth-century "free enterprise" capitalism? Certainly not. Problems are never solved by returning to a stage which one has already outgrown. I suggest transforming our social system form a bureaucratically managed industrialism in which maximal production and consumption ends in a humanist industrialism in which man and full development of his potentialities – those of all love and of reason—are the aims of social arrangements. Production and consumption should serve only as means to this end, and should be prevented from ruling man.

    For many of us, summertime means road trips to the beach or mountains, or at the very least some additional dust and bird poop on the exterior of our vehicles. The extra dirt leads us to do one of two things: wash our car in the driveway or head to the car wash. But which choice is better for the environment?

    The main concerns with either choice are the amount of fresh water being used and the types of chemicals used to remove the dirt. Both of these concerns can be closely monitored when washing the car at home, says Katy Gresh, spokeswoman for the Southwest Region of the Pennsylvania Department of Environmental Protection. She advises car owners to put aside a set amount of water for the entire wash. "It's just like brushing your teeth," she says, "You don't want to leave the water running of more than you need for the job." But even following this advice comes with an environmental risk: Washing your car in the driveway or street flushes the dirty water into storm drains.

    John Schombert, executive director of 3 Rivers Wet Weather, his organization works to educate the public about storm sewers (下水道) and water runoff, keeping this untreated water from entering the Allegheny region's waterways. "We ask people to, consider washing their cars on lawns or other permeable (透水的) surfaces where the water gets absorbed," Schombert says. "Soil can break down and help filter (过滤) those things," Schombert says. "Storm sewers are not made for waste disposal." Even when car owners use natural soaps to wash their cars, which Schombert says are probably ineffective at breaking down grease anyway.

    The commercial car wash down the street knows full well the rules regarding wastewater in storm sewers. According to the International Carwash Association (ICA), professional car washes must use water reclamation systems. These mandated processes not only keep the dirty water out of storm sewers and regular water treatment systems, but they also work to reduce water usage at commercial facilities.

Dangerous Driving Habits

Approximately 1. 3 million people around the world die in road accidents every year, making it one of the top ten causes of deaths. {#blank#}1{#/blank#}To prevent these consequences, here are some dangerous driving habits you should avoid.

{#blank#}2{#/blank#}

Were you actually surprised by this one? Here's the truth — you're 23 times more likely to crash if you text while driving. {#blank#}3{#/blank#}Disturbingly, 77 percent of young adult drivers say they can safely drive while texting. Actually, distracted driving accidents, including those caused by the use of handheld devices, form the No. 1 killer of teens, according to the NHTSA and others.

Drive when you're tired.

Avoid driving when you're tired, since you will have slower reaction times and you are very likely to fall asleep at the wheel. If you're exhausted and your body needs sleep, it is going to get it, one way or another. {#blank#}4{#/blank#}If you're already in the car, pull over and take a nap and then continue when you've woken up. Having someone with you in the car can help prevent accidents, since you are more likely to be alert if you have company.

Keep an eye on the kids.

According to the AAA Foundation for Traffic Safety, passengers are ranked by drivers as among the most frequent causes of distraction（分心）. Young children are four times as distracting as adults, while infants can be eight times more distracting, the AAA Foundation reports. {#blank#}5{#/blank#}.

A. Talk on the phone.

B. Text and update social media.

C. Therefore, keep an eye on the kids if you drive fast.

D. It takes about five seconds of attention to send a brief text.

E. If you're very tired, avoid driving home and take a cab instead.

F. So think twice before glancing at your little one at the backseat.

G. Another 20-50 million people are injured due to road accidents every year.