In 1905, as part of his Special Theory of Relativity, Albert Einstein published the point that a large amount of energy could be released from a small amount of matter. This was expressed by equation E = me 2(energy = mass times the speed of light squared). But bombs were not what Einstein had in mind when he published this equation.

    In 1929, he publicly declared that if a war broke out he would “refused to do war service, direct or indirect…” His position would change in 1933, as the result of Adolf Hitler's coming into power in Germany.

    Einstein's greatest role in the invention of the atomic bomb was signing a letter to President Franklin Roosevelt urging that the bomb be built because some physicists feared that Germany might be working on an atomic bomb. Among those concerned were physicists Leo Szilard and Eugene Wigner. But Szilard and Wigner had no influence with those in power. So in July 1939 they explained the problem to someone who did: Albert Einstein. After talking with Einstein, in August 1939 Szilard wrote a letter to President Roosevelt with Einstein's signature on it, which was delivered to Roosevelt in October 1939.

    Germany has invaded Poland the previous month; the time was ripe for action. That October research of a-bomb began but proceeded slowly because the invention of the atomic bomb seemed distant and unlikely. In April 1940 an Einstein letter, ghost-written by Szilard, pressed the researchers on the need for “greater speed”.

    As the realization of nuclear weapons grew near, Einstein looked beyond the current war to future problems that such weapons could bring. He wrote to his friend about his fear about the future use of the a-bomb.

    The atomic bombings of Japan occurred three months after Germany gave in.

In November 1954, five months before his death, Einstein summarized his feelings about his role in the creation of the atomic bomb: “I made one great mistake in my life… when I signed a letter to President Roosevelt recommending that atom bombs be made; but there was some justification—- the danger that the Germans would make them”.

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    I had the honor of being elected chief of my tribe(部落). With the title came great responsibility. It was my job to make peace with the Maori Tamaki tribe, whose village we visited. Their warriors leapt from a canoe and faced us down with fierce growls, bulging eyes and much swishing of sticks. They laid a palm frond on the ground and, as head honcho, I was compelled to accept this peace offering by picking it up, then touching noses with their chief. “Kia ora”, he said, welcoming us into the woodland home of his people.

    My “tribe” was my New Zealand tour group, who had forced me into being their leader. We'd been warned that the ceremony was a serious occasion and that to laugh or even smile would be considered rude to the Tamaki. After that it was non-stop fun as they showed their ancient customs and I received instruction in performing the haka, the war dance by the All Blacks rugby team.

    Then they pulled our dinner of lamb, beef and vegetables out of the ground. It had been slow-cooked in the heat that simmers just below the surface in the geothermal(地热的) area of North Island, a Maori tradition known as a hangi that goes back an extremely long period of time.

    Obviously, this form of it is put on for tourists but it was hugely enjoyable. The journey back to the hotel was alone worth the effort, our hilarious Maori elder driver being deserving of his own television show. “The wheels on the bus go round and round,” he got us singing, while he circuited(绕……环行) a roundabout three times.

    A couple of days from the end of my trip, there was still something missing, a New Zealand icon I yearned to see to make my grand tour complete. Riding over a hill, there it was – Aotearoa. The Maori name for New Zealand translates as “Land of the long white cloud”. Can I say “Kia ora, Aotearoa?” You bet I can.

    If you want to become a fluent English speaker you should take some advice: There are four skills in learning English. They are reading, listening, speaking, and writing. The most important thing you must remember is that if you want to improve your speaking and writing skills you should first master the skills of reading and listening.

    Read as much as you can. But your reading must be active. It means that you must think about the meaning of the sentence, the meaning of the unfamiliar words, etc. There is no need for you to pay much attention to grammars or try to understand all the unfamiliar words you come across ， but the fact that you see them for the first time and recognize them whenever you see them, for example, in other passages or books, is enough. It would be better to prepare yourself a notebook so you can write down the important words or sentences in it.

    As for listening, there are two choices: besides reading, you can listen every day for about 30 minutes. You can only pay attention to your reading and become skillful at your reading, then you can catch up on your listening. Since you have lots of inputs in your mind, you can easily guess what the speaker is going to say. This never means that you should not practice listening.

    For listening you can listen to cartoons or some movies that are specially made for children. Their languages are easy. Or if you are good at listening you can listen to VOA or BBC programs every day. Again the thing to remember is being active in listening and preferably taking some notes.

    If you follow these pieces of advice, your speaking and writing will improve automatically, and you can be sure that with a little effort they will become perfect.

    A couple had a son eleven years after they married. They were a loving couple and the boy was the apple of their eye. When the boy was around four years old, one day the father was very tired after work so he asked his wife to pick up their son. The mother, who was very busy in the kitchen, totally forgot about it.

    Later the boy lost his way on the street. When the son was found missing, the mother hurried to look for him, but she didn't find him. The mother felt very sad and didn't know how to face her husband.

    When the father went to the police station after hearing that the son was missing, he looked at his wife and said just four words. What do you think the four words were? The husband just said “I love you, darling.”

    The son was missing. If she had picked him up earlier, this would not have happened. There is no point in blaming (责备) anyone. His wife had also lost her only child. What his wife needed at that moment was comfort and understanding from her husband. That is what the husband gave his wife. Several weeks later, with the help of the police, the couple finally found their lost son. The family's relationship became stronger over that time.

    Sometimes we spend lots of time asking who is to blame. We miss many chances to give each other support and let each other feel the warmth of human relationships. Get rid of all your unwillingness to forgive, selfishness, and fears and you will find the world is much more wonderful.

    On August 5 just after 7.30 pm, Mike Estepa suffered a massive heart attack. The crazy cyclist was 40 kilometres into his Sunday ride when he stopped by the side of the road to text his family saying he'd be home in about 30 minutes. Moments later, he was lying in the ditch, unconscious.

    Larissa Arthur was driving back to Calgary from a hike in Field, B. C. with a friend. It was a warm and sunny day, and the two were chatting when a flush of yellow caught Arthur's eyes. She immediately pulled off the road.

    As Arthur approached the figure, she feared the worst: Estepa was covered in ants and exhibited no signs of life. There was no pulse and he wasn't breathing." says Arthur. A bystander called 911 and Arthur, a registered nurse, started chest compressions. She and two other drivers took turns carrying out CPR for the next 15 minutes before medical teams arrived and whisked Estepa away.

    Two days later, when Estepa woke up in the hospital, he was shocked to learn he had gone into cardiac arrest (心脏骤停). How did this happen, and, why was he lucky enough to have survived? He was full of gratitude and needed to speak with the woman who had saved him, whom he named his "angel".

    "It was emotional," says Arthur of her meeting with Estepa a few weeks later. Saving his life had extra importance for her: the bike she was returning from that day was one of 100 she's planned to honour her father, who died in 2017 after he fell during a hike that Arthur was meant to be on. "I couldn't save my father's life." Arthur says, "but this was a chance for me to save someone."

The rejuvenating effects of a restorative nocturnal repose are widely recognized; it can engender a state of enhanced well-being. Academics in the field posit that the excellence of one's slumber may indeed be instrumental in the prolongation of one's lifespan.

Male subjects who enjoy a state of somnolent tranquility could potentially extend their existence by a span of nearly five decades in comparison to those bereft of such repose. The female counterparts stand to gain an increment of two decades. Additionally, it has been observed that youthful individuals who adhere to salutary somniferous routines are less susceptible to a premature demise. However, the mere quantity of repose is insufficient to reap the potential healthful dividends; the caliber of one's slumber is equally pivotal.

The parameters of commendable slumber were delineated by a quintet of distinct criteria. These encompassed an optimal duration of seven to eight hours of repose per nocturnal cycle; experiencing difficulty in the initiation of sleep no more than twice per hebdomadal period; similar challenges in maintaining somnolence no more than twice weekly; abstaining from the consumption of any soporific pharmaceuticals; and awakening with a sensation of invigoration on no fewer than five days per septenary cycle.

The conclusions derived from the study intimate that approximately 8% of fatalities, irrespective of their etiology, could be imputed to inadequate somniferous patterns. Dr. Frank Qian, a resident physician specializing in internal medicine at the Beth Israel Deaconess Medical Center in Boston, America, remarked, "A distinct proportional response relationship was discerned. Consequently, an increase in the beneficial elements pertaining to the quality of sleep correlates with a progressive diminution in mortality from all causes."

The research collated data from a populace of 172,321 individuals with an average age of 50, of which 54% were female. These participants were engaged in the National Health Interview Survey, spanning the years 2013 to 2018, which sought to scrutinize the well-being of the American populace, inclusive of inquiries into their somniferous habits.

The subjects were tracked for a mean period of 4.3 years, during which 8,681 succumbed to death. Of these fatalities, 2,610 (30%) were attributable to cardiovascular afflictions, 2,052 (24%) to oncological disorders, and 4,019 (46%) to a miscellany of other causes. Among the male and female participants who reported adherence to all five indices of quality sleep (an optimal quintile score), the expectancy of life was augmented by 4.7 years for males and by 2.4% for females, in contradistinction to those who possessed none or a solitary factor.

Further scholarly endeavor is warranted to elucidate the raison d'être for the dichotomy in the enhancement of life expectancy, with males exhibiting twice the increment observed in females despite equivalent somniferous quality.

A caveat of the study lies in the reliance on self-reported somniferous habits, which were not subjected to objective quantification or verification.