汽车上的phone是指在汽车内部装有的手机支持系统，它可以通过连接蓝牙或USB等方式与车载娱乐系统相连，实现电话、音乐播放、导航等功能。这种系统让驾驶员可以更方便地使用手机，同时也避免了因为驾驶时使用手机而被罚款的情况。

The phone in the car refers to the mobile phone support system installed inside the car. It can be connected to the car's entertainment system through Bluetooth or USB, enabling functions such as making phone calls, playing music, and navigation. This system allows drivers to use their phones more conveniently and also avoids fines for using phones while driving.