In this paper, through the concrete examples, the author introduces two kinds of parsing approaches: bottom-up parsing and top-down parsing.
通过具体的实例，介绍了两种基于短语结构语法的剖析方法——自底向上剖析和自顶向下剖析。
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Top - Down Parsing Language?
自上而下的剖析语言TDPL ？
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