To set this up , I held the Galaxy Nexus up as if I was about to take a photo of myself with the front-facing camera , and a traced image of my face appeared on the screen .
启动该功能时,要把GalaxyNexus举起来面对自己,就像打算用前置摄像头自拍一样,然后脸部就会实时出现在屏幕上。