【推荐1】A science teacher's job is teaching science to his students. A person who decides to become a science teacher may have many career choices available to him. He may decide to work in a primary to teach a range of subjects, including science.     1     Some even choose to earn advanced degrees that allow them to work as college professors.

    2     They may cover such basic science subjects as biology, chemistry, physics and earth science as well as a full range of other subjects. The subjects a science teacher covers may vary, depending on such factors as where he teaches and the age of the students he's instructing.

A person who wants to become a science teacher for primary-aged students may find it necessary to teach other subjects in addition to science.     3     In such classroom, one teacher may instruct students not only in science but also math, history, language and other subjects.

At the high school level, science teachers usually have the opportunity to focus on their chosen subject. Typically, teachers at this level are required to earn bachelor's degree in the subjects they want to teach in addition to teaching certifications.     4    

College science teachers usually need more advanced degrees to secure their positions. Typically, a full-time science professor needs a doctoral degree in order to do so.     5     That is because colleges typically need teachers in basic and highly-specialized courses.

【推荐2】When I met him, I had a lot of anger inside of me. I’ve lived my whole life in Spanish Harlem, but in my neighborhood, there are shoot-ups all the time. I know kids who have been shot (枪击) or beaten up. I have friends who ended up in prison. I could have ended up that way, too, but Mr. Clark wouldn’t let that happen.

Mr. Clark worked long hours, making sure I did my work. My grades rose. In fact, the scores of our whole class rose. One day, he took our class to see The Phantom of the Opera, and it was the first time some kids had ever been out of Harlem. Before the show, he treated (招待) us to dinner at a restaurant and taught us not to talk with our mouths full. We did not want to let him down.

Mr. Clark was selected (选拔) as Disney’s 2000 Teacher of the Year. He said he would draw three names (抽签) out of a hat: those students would go with him to Los Angles to get the award (奖品). But when the time came to draw names, Mr. Clark said, “You’re all going.”

On graduation day, there were a lot of tears. We didn’t want his class to end. In 2001, he moved to Atlanta, but he always kept in touch. He started giving lectures about education, and wrote a best-selling book based on his classroom rules, The Essential 55. In 2003, Mr. Clark took some of us on a trip to South Africa to deliver school supplies and visit orphanages (孤儿院). It was the most amazing experience of my life. It’s now my dream to one day start a group of women’s clubs, helping people from all backgrounds.

【推荐3】It was my first day of sixth grade. I looked at my schedule and saw that I had Mrs.Foxwell and this made me happy. Over the next three years, Mrs.Foxwell taught me many important things that I will never forget.

Of all of the teachers and coaches I have had in my life, Mrs.Foxwell has been my favorite leader. In her class, she taught me how to be a successful leader. She also taught me that good leaders earn everyone’s respect.

Mrs.Foxwell is one of the most respected and respectful people I know. She is always kind to everyone and she treats others the way that she wants to be treated. She taught me respect in many different ways, but mainly how to be respectful in the business world. She told me that I needed to have a firm handshake and that I should always look people in the eye when I talk to them. Mrs.Foxwell also taught me that you could earn someone’s respect by working hard to achieve your goals.

In addition to working at Brandywine Springs, Mrs.Foxwell once worked at a bank as a manager but she gave that up to teach kids how to be successful. Mrs.Foxwell told our class how she would cry because of the amount of work she had to do in very little time. She taught our class that working all night at something you don’t love is very stressful, so you should try and do something you love. In the end, she taught me that you have to keep your head high and pull through. I don’t think I have ever worked as hard in any class as I did in her class. We created our own 28-page business plan to share with her, our parents, other teachers and our classmates. Although creating a business from nothing was a lot of hard work, I really enjoyed it and learned several lessons that will help me throughout life.

I have had a lot of role models in my life, but one of the biggest is Eva Foxwell. She taught me leadership qualities, how to be respectful and why you should work hard. She changed my life for the better and I desire to be like her.

【推荐1】Heat stress from extreme heat and humidity (湿度) will annually affect areas that are now home to 1.2 billion people by 2100, assuming current greenhouse gas emissions (排放), according to a Rutgers study.

Most climate studies on projected heat stress have focused too much on extreme heat but did not consider the role of humidity, which is another key driver. “When we look at the risks of a warmer planet, we need to pay particular attention to the combined effects of extreme heat and humidity, which are especially dangerous to human health.” said Robert E. Kopp, director of the Rutgers Institute of Earth, Ocean, and Atmospheric Sciences.

Rising global temperatures are increasing exposure to heat stress, which harms human health. Heat stress is caused by the body’s inability to cool down properly through sweating. Body temperature can rise rapidly, and high temperatures may damage the brain and other vital organs. What’s more, heat stress can result in heatstroke (中暑), which is the most serious heat-related illness, can kill or cause permanent disability without emergency treatment.

Annual exposure to extreme heat and humidity above safety guidelines will be projected to affect areas that are currently home to about 500 million people, if the planet warms by 1.5℃ and nearly 800 million at 2℃. The planet has already warmed by about 1.2℃ above late 19th century levels.

An estimated 1.2 billion people would be affected with 3℃ of warming, as expected by the end of this century under current global policies. That’s nearly four times the number of people affected today, and nearly 12 times the number who were affected in no industrial age.

【推荐3】As the climate warms, birds are shrinking and their wingspans are growing, according to a new study. Researchers analyzed 70,716 birds from 52 kinds of North American migratory（迁徙的）bird species collected over 40 years. The authors say the study is the largest of its kind and that the findings are important to understanding how animals will adapt to climate change.

"We found almost all of the species were getting smaller." said lead author Brian Weeks, an assistant professor at the University of Michigan.

"The species were pretty diverse, but responding in a similar wav." he said. "The consistency was shocking."

He said studies of animal responses to climate change often focus on shifts in geographical range or timing of life events, like migration and birth. But this study suggests body morphology（形态）is a crucial third aspect.

"That's one major implication," he said, "It's hard to understand how birds will adapt without taking all three of these things into consideration."

The findings showed that from 1978 to 2016, the length of the birds' lower leg bone shortened by 2.4%. Over the same time, the wings lengthened by 1.3%.

The evidence suggests warming temperatures caused the decrease in body size, which in turn caused the increase in wing length.

"Migration is an incredibly taxing thing they do," Mr. Weeks said, explaining that the smaller body size means less energy available for the birds to complete their long journeys.

He says the birds most likely to survive migration were the ones with longer wingspans and smaller bodies.

The scientists aren't exactly sure why warmer temperatures cause birds to shrink. One theory is that smaller animals are better at cooling off, losing body heat more quickly.