然而迪斯尼公司是从前方投影成像的，而面具机器人的制造者使用的是车载式背面投影仪，确保了毫无阻碍的面对面互动模式。
Whereas Walt Disney projected images from the front, the makers of Mask-bot use on-board rear projection to ensure a seamless face-to-face interaction.
机身正面设有两个摄像头，背面还设有一个一千两百万像素摄像头；另外还集成了15流明亮度DLP投影机。
It otherwise has dual front cameras, a 12-megapixel camera on the back and a 15 lumens DLP pico-projector.
此功能在打印投影胶片时也很有用：在投影胶片的背面做标记而不会划伤原件。
This feature is also useful for printing transparencies when you want to make notations on the back of the transparency without scratching the original.
为了研究两平面相交可见性的规律，从空间一个平面的投影特点入手，将平面分别设定为正面、背面两面，讨论平面图形各顶点投影顺序与平面正面、背面的投影所具有的内在规律。
To study the intersection visibility of two general place planes, this paper set the planes as two faces of front and backs from the point of projection character of a space plane.
为了研究两平面相交可见性的规律，从空间一个平面的投影特点入手，将平面分别设定为正面、背面两面，讨论平面图形各顶点投影顺序与平面正面、背面的投影所具有的内在规律。
To study the intersection visibility of two general place planes, this paper set the planes as two faces of front and backs from the point of projection character of a space plane.
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