To find their sites, archaeologists today rely heavily on systematic survey methods and a variety of high-technology tools and techniques.

为了找到他们的遗址，考古学家现在非常依赖系统的调查方法以及各种高科技工具和技术。

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There are three main types of descriptive methods: observational methods, case-study methods and survey methods.

描述性研究法一共分为三类：观察法，案例分析法以及调研法。

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Given improvements in survey methods, experts warn against drawing firm conclusionsfrom comparisons of the three sets of results.

如今的调查方法比以前先进得多，因此专家反对简单比较这三组数字而匆忙下定论的做法。

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It shared the headline finding but not the questionnaire, survey methods or calculation used to find losses.

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The latter, based on respected survey methods, nevertheless has been criticized as excessive.

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They have suspected for a while that the older survey methods were biased, and that the inflation thus produced was tolerated because it helped twang the heart-strings of potential donors.

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