In 1974, after filling out fifty applications, going through four interviews, and winning one offer, I took what I could get — a teaching job at what I considered a distant wild area: western New Jersey. My characteristic optimism was alive only when I reminded myself that I would be doing what I had wanted to do since I was fourteen — teaching English.

School started, I was teaching English. I worked hard, taking time off only to eat and sleep. And then there was my sixth grade class who were only six years younger than me. I had a problem long before I knew it. I was struggling in my work as a young idealistic teacher. I wanted to make literature come alive and to promote a love of the written word. The students wanted to throw spitballs and whisper dirty words in the back of the room.

In college I had been taught that a successful educator should ignore bad behavior. So I did, confident that, the bad behavior would disappear as I gave my students positive attention. But in fact, humans particularly teenagers rarely seem reasonable. By the time my boss, who was also my taskmaster, known to be the strictest, most demanding, quickest to fire inexperienced teachers, came into the classroom to observe me, the students exhibited very little good behavior.

My boss sat in the back of the room. The boys in the class were making animal noises, hitting each other while the girls filed their nails or read magazines. I just pretended it all wasn't happening, and went on lecturing and tried to ask some inspiring questions. My boss, sitting in the back of room, seemed to be growing angrier and angrier. After twenty minutes he left, silently. Visions of unemployment marched before my eyes.

注意：

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After class, I took a deep breath and walked into his office.

Fifteen years later, I still drive that winding road to the same school.

One of the most famous Chinese medical (treat) is Chinese acupuncture, dating from the Stone Age. As acupuncture developed, nine different kinds of needles appeared, which (have) different shapes. The majority of acupuncturists now use stainless steel needles. They push needles into the skin at certain points on the body (call) acupuncture points. So far, more than 360 acupuncture points (identify), each linked to a different part of the body. Over the years, not only has acupuncture been used to treat physical and (mentally) problems, but it has also been applied to treat people abuse alcohol, tobacco or drugs. it is not clear how acupuncture actually works, it is fact that acupuncture has become very popular. Today, it has come into widespread use around the world a symbol of traditional Chinese culture. While doubts about its safety have (gradual) disappeared, interest continues to grow.

Researchers worldwide are racing to develop potential vaccines and drugs to fight COVID-19. Now, a group of researchers has figured out the molecular(分子的) structure of a key protein that the coronavirus uses to invade human cells.

Previous research shows that the coronaviruses invade cells through the so-called “spike” proteins, but those proteins take on different shapes in different coronaviruses. Figuring out the shape of the spike protein in the novel coronavirus is the key to figuring out how to target the virus. But the spike protein is the major surface protein that it uses to combine with a receptor—another protein that acts like a doorway into a human cell. After the spike protein combines with the human cell receptor, the viral membrane combines with the human cell membrane, allowing the genome of the virus to enter human cells and begin infection. To prevent attachment and combination, people will prevent entry.

Earlier this month, researchers published the genome of the novel coronavirus. They identified the specific genes that code for the spike protein and then sent that gene information to a company that creates the genes. The group then injected those genes into mammalian cells in a lab dish. Next, using a very detailed microscopy technique called cryogenic electron microscopy, the group created a 3D “map”, or “blueprint” of the spike proteins. The blueprint revealed the structure of the molecule. It's a very important step forward and may help with the development of a vaccine against COVID-19.The spike protein would be the likely choice for the rapid development of vaccine antigens and treatments.

According to a recent study, a new kind of genetically modified(转基因的)rice can prevent infections of HIV, the virus responsible for the disease AIDS.

The study reports the newly-developed rice produces proteins(蛋白质)that attach directly to the HIV virus. This process keeps the virus from mixing with human cells. The scientists say it can remove the effect of the virus and block its spreading.

The Joint United Nations Programme on HIV/AIDS reports that worldwide, nearly 37 million people were living with HIV in 2017.The organization says the largest number of those is in developing countries. Nearly two-thirds of HIV cases are in Africa. Now there is no cure for HIV/AIDS though there have been developments in oral drug treatments to slow the progression of the disease.

The new study predicts the rice-based method will lead to long-term use of the anti-HIV treatment across the developing world. Researchers say the “groundbreaking” discovery is “realistically the only way” that anti-HIV combination treatments can be produced at a cost low enough for the developing world.

They say the easiest and most cost-effective way to use the rice will be to make it into a cream to be put on the skin. The HIV-fighting proteins can then enter the body through the skin. People all over the world could grow the rice and make the cream themselves. This would prevent the cost and travel required for many patients to receive treatments and medicine.

The process of changing the genetic structure of food crops has been debated for some time. Critics of genetically engineered crops believe they can harm people. The scientific team says further testing is needed to ensure that the genetic engineering process does not produce any additional chemicals that could be dangerous to human bodies.

He has gone to play soccer in the stadium .

in the gym?

, a few students stood there chatting.

, I had no difficulty finding their village.

The festival spread to China and was widely accepted.