The statements are parsed to determine whether keywords and their location in the statements are valid.
工具会解析这些语句，以确定语句中各个关键词及其位置是否有效。
Query parsing comes down to determining which part of the query contains keywords to search for and which part contains location information.
查询解析的目的是确定查询的哪个部分包含所搜索的关键字，哪个部分包含位置信息。
Listing 5 generates a simple event search form, with fields for event keywords, location, and type.
清单5产生了一个简单的事件搜索表单，具有针对事件关键字、位置和类型的字段。
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