绪论，陈述选题的原因，并简要介绍前人的研究成果、与研究相关的概念以及本文的研究方法和内容构成。
The introduction describes reasons of choosing such topic, and briefly sheds light on preceding researches and studying methods as well as contents in this thesis.
在内罗毕，古德被介绍给科学家Louis Leakey，他发现的化石最终证明人类的发源地是非洲，而不是先前人们认为的亚洲。
In Nairobi, Goodall was introduced to Louis Leakey, the scientist whose fossil discoveries had finally proved mankind's roots were African, not Asian, as had previously been supposed.
首先介绍了氡气找金属矿的可行性，回顾了前人在金属矿床勘探方面的成果资料。
The paper introduces the feasibility of applying radon gas in metal ore prospecting and reviews the previous achievements in metal ore exploration.
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