The back camera takes decent pictures but it's the practice of holding up a large slab to take a picture that feels a bit weird.

背面的摄像头用来拍摄远照片但是拿着一个大板子来拍摄照片感觉有点怪异。

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It has a lens system to focus light onto the film at the back of the camera.

它的镜片系统可以将光线聚焦到相机后部的胶片上。

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The Lunar Rover also had a television camera and an antenna for sending color television broadcasts back to Earth.

VOA: special.2009.07.29

The way he described is when you try to get down a quantum dimensions and you are standing there with your camera, just remember the sun is at your back and your shadow is always in the picture.

这种方法被他描述为,当你试着处理一个量子尺寸时,并且你试着拿着你的相机在那，记住太阳在你的背后,而你的影子总是在照片上。

麻省理工公开课 - 固态化学导论课程节选

You can switch from a front to a back camera to show things as you talk.

FORBES: Focus

Like we suspected, that astronomical name is attached to the conspicuously grounded Jasper: as long as the listing is accurate, we're looking at a 1.2GHz dual-core processor (toned down from the 1.5GHz rumor), a 4-inch, 800 x 480 display, a so-so 3.2-megapixel back camera and a 1.3-megapixel shooter at the front.

ENGADGET: Samsung Galaxy Stellar gets premature outing at Best Buy

It starts when the Back-Up Camera helps you safely reverse out of your driveway, continues through your commute with premium GPS navigation features, and does not end until the Back-Up Camera helps you park the car without damage or stress and you finally shut off the ignition.

ENGADGET: Wireless Back-Up Camera for the Magellan RoadMate checks your six