China Historical Geographic Information System 中国历史地理信息系统 retrieval of historical information 检索历史数据 This Historical Information 这一历史资料 ..
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构建一个时间系列后,您可能想要检索历史数据。
Once you have built up a time series, you will probably want to retrieve historical data.
实际的 Expect 应用程序通常用于解析命令行参数、将结果显示在分栏的表格中、从数据库中检索历史数据、显示图形用户界面 (GUI),以及更多的用途。
Real Expect applications often parse command-line arguments, tabulate results in columns, retrieve historical data from databases, display graphical user interfaces (GUIs), and much more.
过滤器用于指定时间戳,它是为了只检索所关心的时间段中的历史数据。
A filter is used to specify a timestamp in order to only retrieve the historical data for the time period that is of interest.
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