以前的手机通过手机信号发射塔确定用户的位置，新款手机有一个GPS接收器能够随时追踪使用者。
The older phone triangulates a user's position via cell-phone towers. The new one has a GPS receiver that can track a user in real time.
以前的手机通过手机信号发射塔确定用户的位置，新款手机有一个GPS接收器能够随时追踪使用者。
The older phone triangulates a user's position via cell-phone towers. The new one has a GPS receiver that can track a user in real time.
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