坐标值代表纬度和经度：“地理” 坐标，不是投影坐标。
The coordinate values represent latitude and longitude: "geographic" coordinates, not projected ones.
该标记再次用到从地理定位 API 接收到的纬度和经度。
The marker once again uses the latitude and longitude that you received from the geolocation API.
这个API可执行地理编码或者接收地址将其转换为映射坐标(纬度和经度)。
This API lets you perform geocoding, or, taking an address and turning it into mapping coordinates (latitude and longitude.)
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