剑桥7长难句汇总

1. At the height of the Roman Empire, nine major systems, with an innovative layout of pipes and well-built sewers, supplied the occupants of Rome with as much water per person as is provided in many parts of the industrial today. 2. Unprecedented construction of tens of thousands of monumental engineering projects designed to control floods, protect clean water supplies, and provide water for irrigation and hydropower brought great benefits to hundreds of millions of people. 3. Nevertheless, it may be the only way to address successfully the pressing problems of providing everyone with clean water to drink, adequate water to grow food and a life free from preventable water-related illness。 1. Given that there is a living to be made at night, and given that alternative daytime trades are thoroughly occupied, natural selection has favored bats that make a go of the night-hunting trade. 2. Only after the mysterious mass extinction of the dinosaurs about 65 million years ago were our ancestors able to emerge into the daytime in any substantial numbers. 3. The light source must therefore be immensely brighter if it used as a headlight to illuminate the path, than if it is to be used as a signal to others. 4. The Sonar and Radar pioneers didn’t know it then, but all the world now knows that bats, or rather natural selection working on bats, had perfected the system tens of millions of years earlier, and their ‘radar’ achieves feats of detection and navigation that would strike an engineer dumb with admiration. 1. If we think of a book we studied months or years ago, we will find it easier to recall peripheral details - the colour, the binding, the typeface, the table at the library where we sat while studying it - than the content on which we were concentrating. 2. Through meeting with the staff and satisfied students they develop the expectation that learning will be easy and pleasant and that they will successfully learn several hundred words of the foreign language during the class. 3. Another difference from conventional teaching is the evidence that students can regularly learn 1,000 new words of a foreign language during a suggestopedic session, as well as grammar and idiom 1. With its special shock absorbers to dampen the effect of sudden sideways movements from an earthquake, the thirty-six-storey Kasumigaseki building in central Tokyo —Japan’s first skyscraper - was c onsidered a masterpiece of modern engineering when it was built in 1968. 2. Yet in 826, with only pegs and wedges to keep his wooden structure upright, the master builder Kobodaishi had no hesitation in sending his majestic Toji pagoda soaring fifty-five metres into the sky - nearly half as high as the kasumigaseki skyscraper built some eleven centuries later. 3. Another strange feature of the Japanese pagoda is that, because the building tapers, with each successive floor plan being smaller than the one below, none of the vertical pillars that carry the weight of the building is connected to its corresponding pillar above. 1. Natural soil fertility is dropping in many areas because of continuous industrial fertiliser and pesticide use, while the growth of algae is increasing in lakes because of the fertilizer run-off. 2. Breaking away from industrial agriculture as the solution to hunger may be very hard for some countries, but in Britain, where the immediate need to supply food is less urgent, and the costs and the damage of intensive farming have been clearly seen, it may be more feasible. 3. He is recommending the immediate introd uction of a ‘greener food standard’, which would push the market towards more sustainable environmental practices than the current norm, while not requiring the full commitment to organic production. 1. The socio-economic survey of more than 400 households in the district indicated that a household in Makete spent, on average, seven hours a day on transporing themselves and their goods, a figure which seemed extreme but which has also been obtained in surveys in other rural areas in Africa. Those who have bought donkeys are mainly form richer households but, with an increased supply through local breeding, donkeys should become more affordable. 3. It should be noted, however, that a donkey, which at 20,000 Tanzanian shillings costs less than a bicycle, is still an investmentary measures if one wants to assist rural poor. 1. Among these, the world of the ant has come in for considerable scrutiny lately, and the idea that ants demonstrate sparks of cognition has certainly not been rejected by those involved in these investigations. 2. They farm fungi, raise aphids as livestock, launch armies to war, use chemical sprays to alarm and confuse enemies, capture slaves, engage in child labour, exchange information ceaselessly. 3. Whereas prehistoric man had no exposure to urban lifestyles-the forcing house of intelligence-the evidence suggests that ants have lived in urban settings for close on a hundred million years, developing and maintaining underground cities of specialized chambers and tunnels. 1. A number of techniques developed since the 1950s, however, have placed the study of these subjects on a sounder and more obiective footing. 2. All proteins ‘drift’, or produce variants, over the generations, and members of an interbreeding human population will share a set of such variants. 3. Thus, by comparing the Gm allotypes of two different populations (e.g. two Indian tribes), one can establish their genetic ‘distance’, which itself can be calibrated to give an indication of the length of time since thes e populations last interbred. 1. European countries are becoming increasingly concerned by major threats to European forests, threats which know no frontiers other than those of geography or climate: air pollution, soil deterioration, the increasing number of forest fires and sometimes even the mismanagement of our woodland and forest heritage. 2. The topics discussed included the co-ordinated study of the destruction of forests, as well as how to combat forest fires and the extension of European research programs on the forest ecosystem. 3. This means that a forest policy is vital, that it must transcend national frontiers and generations of people, and that it must allow for the inevitable changes that take place in the forests, in needs, and hence in policy. 1. Although it dates from several hundred years after the building of the pyramids, its sophistication suggests that the Egyptians might have been developing ideas of flight for a long time. 2. There are plenty of places around the globe where people have no access to heavy machinery, but do know how to deal with wind,sailing and basic mechanical principles. 1. It is this management mechanism that has allowed Alaska salmon stocks –and, accordingly, Alaska salmon fisheries- to prosper, even as salmon populations in the rest of the United States are increasingly considered threatened or even endangered. 2. The MSC then appoints a certification committee, composed of a panel of fisheries experts, which gathers information and opinions from fishermen, biologists, government officials, industry representatives, non-governmental organizations and others. 3. Rather, they contend, it was almost certainly the result of climatic shifts, prompted in part by cumulative effects of the el nino/ la nina phenomenon on Pacific Ocean temperatures,culminating in harsh winter in which huge numbers of salmon eggs were frozen. 1. And yet most of us have had the experience of having to adjust to sleeping in the mountains or the countryside because it was initially ‘too quiet’, an experience that suggests that humans are capable of adapting to a wide range of noise levels. 2. We are much more able to‘tune out’ chronic background noise, even if it is quite loud, than to work under circumstances with unexpected intrusions of noise. 3. Apparently, unpredictable noise produces more fatigue than predictable noise, but it takes a while for this fatigue to take its toll on performance 4. It should be noted that the two groups of children had been carefully matched by the investigations so that they were comparable in age, ethnicity, race, and social class. 5. One study, suggesting that this worry is a realistic one, compared elementary school pupils who attended schools near Los Angeles’s busiest airport with students who attended schools in quiet neighbou rhoods.