In the camera interface, you can click a small icon at the bottom of the screen and switch between the front-facing or back-facing camera.
你可以通过屏幕方的图标按钮进行前后摄像头的切换。
The 20 or so examinees took their seats, each facing a computer screen.
这20来个考试者坐在各人的位子上，每个人的面前都有一个电脑显示屏。
The unibody phone has a 4.3-inch curved glass AMOLED screen with no forward facing buttons; users double-tap to lock and unlock.
这款直板手机使用的是4.3英寸的弧面amoled屏幕，边缘没有物理按键，用户使用双击屏幕来锁屏或解锁。
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