Australia is the smallest continent in the world. It is a little smaller than China. It is on the Southern Hemisphere of the earth. Australia is big, but its population is small. The population of Australia is nearly as large as that of Shanghai.

    Enough laws have been made to fight against pollution. The cities in Australia have little air or water pollution. The sky is blue and the water is clean. You can clearly see fish in the rivers. Plants grow very well.

    Last month we visited Perth, the biggest city in Western Australia, and went to a wild flower exhibition. There we saw large numbers of wild flowers on show, most of which we had never seen before. We had a wonderful time. Perth is famous for its beautiful wild flowers. Every year in spring Perth has a wild flower exhibition. After visiting Perth, we spent a day in the countryside. We sat down and had a rest near a path at the foot of a hill. It was quiet and we enjoyed ourselves very much. When we heard bells ringing at the top of the hills, we looked up, but what we saw made us pick up all our things and run back to our car as quickly as we could. There were about three hundred sheep coming towards us along the path.

    Australia is famous for its sheep and kangaroos. After a short drive from any town, you will find yourself among the white sheep. Sheep, sheep, everywhere you can see sheep.

    The year 2018 will mark the 100th anniversary of the deadliest influenza outbreak in history. It is estimated that the influenza pandemic(瘟疫) of 1918 killed more than 50 million people around the world. Other estimates go much higher. Because of a lack of medical record—keeping, we may never know the exact number.

    The influenza was a fast killer. Some victims died within hours of their first symptoms. Others died after a few days. “Their lungs filled with liquid and they choked to death. ”The 1918 flu pandemic was also different from other outbreaks. It struck many young, healthy people. Viruses usually affect sick or old people.

    Although modem medicine effectively controls many diseases, influenza remains difficult to protect against, The World Health Organization estimates that every year influenza kills 250, 000 to 500, 000 people around the world. Each year, medical scientists develop flu vaccines(疫苗) which offer immunity(免疫)from some influenza viruses. But they can only guess which form of the virus will spread.

    Health officials remain concerned about another flu pandemic. New forms of the flu virus appear regularly. One example was the “swine flu”or H1N1outbreak in 2009. Anthony Fauci, Director of the National Institute of Infectious diseases in the United States says that virus caused a true pandemic.

    To stop the next pandemic, scientists are now researching how to create a universal influenza vaccine. In October 2017, Vanderbilt University Medical Center in the U. S. announced the Universal Influenza Vaccine Initiative. The university said researchers are leading an international effort to develop a universal influenza vaccine that will protect everyone against all forms of the flu anywhere in the world. The university added that researchers will begin tests in early 2018, the Human Vaccines Project, a public—private partnership, is funding the project. However, until a universal influenza vaccine is available, today's seasonal flu vaccine remains important.

Incredible experiences in Bucharest

    Admire one of the world's largest buildings

    The world's biggest parliamentary building, Palace of Parliament, happens to be in Bucharest. Hour-long guided tours manage to take in just a fraction of the building's three-million-plus square feet (there are more than a thousand rooms) and focus on the tons of marble, hardwood, and gold used in the building's construction in the 1980s, a time when Romania was trying to feed its own people. Ceausescu and his wife, Elena, both played a direct role in the construction. It was originally intended to house the presidential offices and the Central Committee of the Romanian Communist Party but was never finished.

    See remains of old “Paris”

    “Paris of the East” was Bucharest's nickname in the decades before World War II. Decades of communist misrule and a tragic earthquake in 1977 brought much of the old city down but there are places here and there where that former elegance can still be glimpsed. The Cismigiu Gardens in the center of the city is a pearl of park built around a romantic lake and featuring old-growth trees and gracious, wrought-iron signposts and benches.

    Learn about Romania's roots

    Walking though Bucharest's busy streets, it's easy to forget that outside the capital and a U large cities, Romania is a largely agricultural country, with a long and rich peasant tradition. The amazing Museum of the Romanian Peasant shows off the elaborate woodworking, pottery-making, egg-painting, and weaving skills of the peasantry in a way that's both educational and amusing. Small tongue-in-cheek signs at the entrance to each room poke fun at modern life, bring a chuckle, and draw you in. Downstairs there's a side exhibition on the Communists' efforts to nationalize the peasantry in the 1970s and 1980s.

    Appreciate 21st-century art

    Romania has exploded onto the contemporary art scene in recent years. The excitement was generated initially by a group of young painters and visual artists from the northern city of Cluj-Napoca, but at least some of the action has shifted to the capital as new galleries and design centers open up. It's hard to pinpoint precisely what constitutes Romanian contemporary art, though critics point to shared elements of wit and dark humor, a somber mood, and bits of surrealism in defining a common style.

    A biologist once criticized for stealing eggs from the nests of the rarest bird in the world has been awarded the "Nobel Prize" of conservation after his methods saved nine species from extinction.

Professor Carl Jones won the 2016 Indianapolis Prize — the highest accolade in the field of animal conservation — for his 40 years of work in Mauritius, where he saved an endangered kestrel from becoming the next Great Auk.

    When the 61-year-old first travelled to the east African island in the 1970s, he was told to close down a project to save the Mauritius kestrel. At the time there were just four left in the wild, making it the rarest bird on Earth. However, he stayed, using the techniques of captive breeding (人工繁殖), which involved snatching eggs from the birds' nests and hatching(孵化)them under incubators, prompting the mothers to lay another set of eggs in the wild.

    A decade later, the number of Mauritius kestrels had soared to over 300 and today there are around 400 in the wild. The biologist has also been necessary in efforts to bring other rare species back from the edge of extinction, including the pink pigeon, echo parakeet and Rodrigues warbler.

    Prof Jones was awarded the $250,000 (£172,000) prize at a ceremony in London.

"As a young man in my 20s, I certainly didn't enjoy the stress and the tension of the criticism I received," reflecting on the start of his career, he said the Maurutius kestrel project had been seen as a "dead loss" at the time. In the 1970s there was fierce opposition to the captive breeding techniques, with critics arguing that they were too risky and took the emphasis off breeding in the wild.

    Prof Jones has devoted his whole life to his work, only becoming a father for the first time eight years ago, at 53. He said receiving the prize was particularly important to him, because it proved that his work to save birds was right.

    The world's oceans will likely lose about one-sixth of their fish and other creatures within 100 years if climate change continues on its current path. Every degree Celsius that the world's oceans warm, their biomass is expected to drop five percent, a study found.

    The study predicts that if there is no change in the rate of worldwide greenhouse gas production, there will be a 17-percent loss of biomass by the year 2100. But, if the world reduces carbon pollution, biomass losses could be limited to only about 5 percent.

    Warming temperatures are the biggest issue. But climate change also produces oceans that are more acidic and have less oxygen. This also harms sea life. Much of the world depends on the oceans for food or work.

    The findings make sense and the possible effects of the predicted losses of animal life are huge. "Climate change has the potential to cause serious new conflicts over ocean resource use as the human population continues to grow," said scientists.

    Marine biologist Boris Worm, who helped run the study, added that the "building blocks of marine life—plankton and bacteria—may decline less heavily."

    "Those marine animals that we use directly, and care about most deeply, are predicted to suffer the most," said Worm. He works at Canada's Dalehousie University.

    Scientists had already believed climate change would likely reduce future ocean life. But past computer-based studies looked at only part of the picture or used only one model. The latest study used six different computer models to give the best picture look yet, William Cheung said.

    University of Georgia marine biologist Samantha Joye was not part of the research. But she praised the study as well researched and extremely detailed, and called it "an urgent call for action".

    You probably know who Marie Curie was, but you may not have heard of Rachel Carson. Of the outstanding ladies listed below, who do you think was the most important woman of the past 100 years?

    Jane Addams (1860-1935)

    Anyone who has ever been helped by a social worker has Jane Addams to thank. Addams helped the poor and worked for peace. She encouraged a sense of community(社区)by creating shelters and promoting education and services for people in need. In 1931, Addams became the first American woman to win the Nobel Peace Prize.

    Rachel Carson (1907-1964)

    If it weren't for Rachel Carson, the environmental movement might not exist today. Her popular 1962 book Silent Spring raised awareness(意识) of the dangers of pollution and the harmful effects of chemicals on humans and on the world's lakes and oceans.

    Sandra Day O'Connor (1930-present)

    When Sandra Day O'Connor finished third in her class at Stanford Law School, in 1952, she could not find work at a law firm because she was a woman. She became an Arizona state senator(参议员) and in 1981, the first woman to join the U. S. Supreme Court(最高法院). O'Connor gave the deciding vote in many important cases during her 24 years on the top court.

    Rosa Parks(1913-2005)

    On December 1,1955, in Montgomery, Alabama, Rasa Parks would not give up her seat on a bus to a white passenger. Her simple act landed Parks in prison. But it also set off the Montgomery bus boycott(抵制). It lasted for more than a year, and kicked off the civil-rights movement. "The only tired I was, was tired of giving in," said Parks.