2015年5月9日托福考试听力真题回顾Conversation 1一个姑娘找教授咨询有关论文资料，说到silver对一些城市的影响，还有矿城的衰落等。
-TPO部分对应参考(论文科研TPO13-C1/TPO17-C1)-TPO对应词汇科研过程HypothesisAlternative hypothesis择一假说Null hypothesis无效假说, 零假说Collect dataSurvey, questionnaireExperimentInterfere, influenceObservationAnalyze dataInterpret dataAnalysisAnalyticalSubjectSampleTreatment groupNon-treatmentControl groupLecture 1New computerizing and old computerizing-TPO部分对应参考(计算机科学类TPO21-L2)-参考背景Computing is any goal-oriented activity requiring, benefiting from, or creating algorithmic processes—e.g. through computers. Computing includes designing, developing and building hardware and software systems; processing, structuring, and managing various kinds of information; doing scientific research on and with computers; making computer systems behave intelligently; and creating and using communications and entertainment media. The field of computing includes computer engineering, software engineering, computer science, information systems, and information technology.Lecture 2建筑学有关。
讲了一个新型节能建筑。
-TPO部分对应参考(建筑学类TPO11-L2/TPO13-L1)-参考背景Green building (also known as green construction or sustainable building) refers to both a structure and the using of processes that are environmentally responsible and resource-efficient throughout a building's life-cycle: from siting to design, construction, operation, maintenance, renovation, and demolition. In other words, green building design involves finding the balance between homebuilding and the sustainable environment. This requires close cooperation of the design team, the architects, the engineers, and the client at all project stages. The Green Building practice expands and complements the classical building design concerns of economy, utility, durability, and comfort.Leadership in Energy and Environmental Design (LEED) is a set of rating systems for the design, construction, operation, and maintenance of green buildings which was Developed by the U.S. Green Building Council.Although new technologies are constantly being developed to complement current practices in creating greener structures, the common objective is that green buildings are designed to reduce the overall impact of the built environment on human health and the natural environment by:· Efficiently using energy, water, and other resources· Protecting occupant health and improving employee productivity· Reducing waste, pollution and environmental degradationA similar concept is natural building, which is usually on a smaller scale and tends to focus on the use of natural materials that are available locally. Other related topics include sustainable design and green architecture. Sustainability may be defined as meeting the needs of present generations without compromising the ability of future generations to meet their needs. Although some green building programs don't address the issue of theretrofitting existing homes, others do, especially through public schemes for energy efficient refurbishment. Green construction principles can easily be applied to retrofit work as well as new construction.Conversation 2学生职业规划跟找工作有关，提供的帮助等等。
-TPO部分对应参考(求职打工TPO6-C1/TPO18-C1)-TPO对应词汇校内工作，课外活动及寻找经济援助：Letter of reference/recommendationCompetitiveBenefit future careerField researchCollect data for papersWaiter, waitress，BabysitterWork at the libraryQualification资格, qualified 合格的Resume, CVfinancial aid经济援助Scholarship FellowshipTeaching assistantship 助教奖学金Research assistantship 研究奖学金Grant 助学金Loan 贷款Need-based以需求为基础Merit-based 以优秀为基础Student union 学生会Clubs 俱乐部Membership 成员资格Career serviceLecture 3到欧洲中世纪人口sharp decrease原因，在中世纪之前Roman Empire统治世界，从庞贝遗迹之类的都能看出那时候人口是很多的，但是中世纪的时候人口骤降是为什么呢?一个原因是建造房子的材料，中世纪的时候是organic material容易decay腐烂，所以没有找到什么证据。
后面讲到demographic distribution map有些地方是空白的。
-TPO部分对应参考(人类学类TPO7-L3/TPO22-L1)-参考背景Medieval demography is the study of human demography in Europe and the Mediterranean during the Middle Ages. It is an estimate of the number of people who were alive during the Medieval period, population trends, life expectancy, family structure, and related issues. In many ways, demography was one of the most crucial factors of historical change throughout the Middle Ages.The population of Europe was stable at a low level in the Early Middle Ages, boomed during the High Middle Ages, reached a stable peak from about 1250-1350, then a number of calamities caused a steep decline, the nature of which historians have debated. Population levels then slowly expanded, gaining momentum in the early 16th century.The science of medieval demography relies on various lines of evidence, such as administrative records, wills and other types of records, archaeological field data, economic data, and written histories. Because the data are often incomplete and/or ambiguous, there can be significant disagreement among medieval demographers.Lecture 4Fishing aggregation，鱼群聚集现象。