The blue light, the projector in the background, the people's expressions, those crazy-looking 3-d glasses.

蓝色的光线、背景中的放映机、人们的表情，还有那些样子古怪的3 - D眼镜。

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At RealD 3-d shows, a projector alternately displays the left-eye and right-eye images, each in an oppositely circular polarized direction, 144 times per second.

在RealD 3d影院放映机以每秒144幅的速度在相反的偏振方向交替播放左眼和右眼的影像。

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The D. C. Metro was an ideal spot to use the Nikon's projector because of its low light and white concrete walls.

华盛顿的地铁是使用尼康内置投影仪的理想地点，因为这里灯光很暗，壁也是白色的。

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Then a few years ago, Tina came home with an old slide projector and a box of slides labeled "Mountain Trip to Japan, 1959" that she'd picked up at estate sales.

NPR: The Trachtenburg Family Slideshow Players