- 移动课堂是100留学教育推出的“贴身学习伴侣”， 其中拥有名师直播、录播课程和名师答疑等多项服务。课堂可以为大家提供新的移动学习平台,让大家学习更方便，想学就学!
1) During the 1920s and 1930s great progress was made in the field of aviation, including the first transatlantic flight of Alcock and Brown in 1919, Charles Lindbergh's solo transatlantic flight.
2) In 1927, and Charles Kingsford Smith's transpacific flight the following year.
3) One of the most successful designs of this period was the Douglas DC-3, which became the first airliner to be profitable carrying passengers exclusively, starting the modern era of passenger airline service.
4) By the beginning of World War II, many towns and cities had built airports, and there were numerous qualified pilots available.
5) The war brought many innovations to aviation, including the first jet aircraft and the first liquid-fueled rockets.
8.17 Sydney’s new year fireworks
1) Fireworks and special effects, including a red "waterfall" from the bridge base, will turn the structure built in 1932 into a giant Aboriginal flag shortly after the sun sets for the last time in 2015.
2) "It's about how we're all so affected by the harbour and its surrounds, how special it is to all of us and how it moves us," said the Welcome to Country's creative director, Rhoda Roberts.
3) From 8:40pm, the bridge will be turned into a canvas showing the Welcome to Country ceremony.
4) Fireworks and special effects will also turn the bridge into a giant Aboriginal flag before the 9pm fireworks display.
8.18 Green tea
1) In May 2006, researchers at Yale University weighed in on green tea's health benefits with a review article that examined more than 100 studies on the subject.
2) They pointed to the "Asian paradox," lower rates of heart disease and cancer in Asia despite high rates of smoking.
3) They theorized that the 1.2 liters of green tea consumed by many Asians each day, provides high levels of polyphenols and other antioxidants.
4) These compounds may work in several ways to improve cardiovascular health.
5) Specifically, green tea may prevent the oxidation of LDL cholesterol (the "bad" type), which in turn can reduce the buildup of plaque in arteries, the researchers wrote.
8.19 Stored food
1) A consequence of a settled existence is that it permits one to store food surpluses, since storage would be pointless if one didn't remain nearby to guard the stored food.
2) So, while some nomadic hunter-gatherers may occasionally bag more food than they can consume in a few days, such a bonanza is of little use to them because they cannot protect it.
3) But stored food is essential for feeding non-food-producing specialists, and certainly for supporting whole towns of them.
4) Hence nomadic hunter- gatherer societies have few or no such full-time specialists, who instead first appear in sedentary societies.
8.20 Weather in Delhi
1) Normally in Delhi, September is a month of almost equatorial fertility and the land seems refreshed and newly-washed.
2) But in the year of our arrival, after a parching summer, the rains had lasted for only three weeks.
3) As a result dust was everywhere and the city’s trees and flowers all looked as if they had been lightly sprinkled with talcum powder.
4) Nevertheless the air was still sticky with damp-heat, and it was in a cloud of perspiration that we began to unpack.