OBU最终可能演化为一个随时告诉司机如何开车的乘客甚至具有更多功能，通过合成对话系统、语音识别系统和面部识别照相机，与司机进行交流。
The OBU could even morph into a virtual back-seat driver that does all these things and more, communicating with the driver using a synthetic voice, speech recognition and face-reading cameras.
OBU最终可能演化为一个随时告诉司机如何开车的乘客甚至具有更多功能，通过合成对话系统、语音识别系统和面部识别照相机，与司机进行交流。
The OBU could even morph into a virtual back-seat driver that does all these things and more, communicating with the driver using a synthetic voice, speech recognition and face-reading cameras.
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