A lot of countries engage in this kind of collection of electronic data, he says.
他说，很多国家都在从事这种电子数据收集活动。
The data collection and the data processing are the foundation of the electronic cartography system.
数据采集和数据处理是电子地图制作的基础。
The data collection and the data processing are the foundation of the electronic cartography system.
数据采集和数据处理是电子地图制作的基础。
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