首先，有时候消息只有一部分包含敏感信息，所以如果加密整个消息的话就会浪费周期时间。
Firstly, sometimes only part of a message contains sensitive information, and so you are wasting cycles if you encrypt the whole message.
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。
Query parsing comes down to determining which part of the query contains keywords to search for and which part contains location information.
您需要布局小部件来将屏幕分成几部分，每个部分包含某些相关信息。
You need a layout widget to split the screen into parts, with each part containing certain relevant information.
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