通过这种三角定位的方式，如果设备必须要从苹果上下载东西的时候，它每次的响应速度会比较快，否则的话，需要等待一分钟左右，以便接收经过的GPS卫星发出的微弱信号（进行定位）。
That way, the device responds quicker than it would if it had to download the data for triangulation each time from Apple, or wait a minute or so for the faint signal from a passing GPS satellite.
到目前为止, 这些是通过摄像头, 或者通过客户携带的手机信号的三角定位法来取得的.
At the moment, this is done with cameras, or by triangulating the position of signals given off by mobile phones that customers are carrying.
一些运营商采用了三角定位技术，此技术通过比较不同基站接收的手机信号来确定手机所处位置。
Some operators opted for triangulation technology, which determines the location of the handset by comparing the signals received by different base-stations.
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