第一章概说。重点阐述了北京话的特点、前人的研究概况以及本文的研究方法和理论依据。
Chapter one is the generality it mainly focuses on the characters of Beijing speech, the survey of former research and the research method and theoretical foundations of this paper.
介绍了竹类的概况和主要特征，并对北京地区引种栽培初见成效的竹类进行了详细的说明。
The paper introduces the general situation and main characters of bamboo, and explains in detail some species that can be planted in Beijing successfully.
本文就北京地铁新线工程概况、防水原则、防水方法及技术措施等作了较详尽的阐述。
In this article, the author introduces some aspects of Beijing Metro new projects such as general institution, waterproof principles, waterproof methods and technical measures and so forth.
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