During tests over several days, the pointer or tracker tracked an IR source and directed a laser beam at that source.

在几天的测试中，指示器或跟踪器跟踪一个红外光源，并引导激光束击中目标。

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Since most camera flashes emit IR along with their burst of visible light, the one substitution allowed the prototype to transmit and record infrared light.

由于大多数相机闪光灯在发出可见光同时就会发射出红外线，这一替换使得原型机能够发送并记录红外线。

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Ir is found in high concentrations in some meteorites, in which the solar system's original chemical composition is preserved.

人们发现，在一些保存着太阳系原始化学成分的陨石中，铱元素的含量很高。

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The Slingbox 500 features built-in Wi-Fi and integrated IR emitters for controlling a set-top box.

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The Sony also lacks the built-in IR emitters of the Revue -- there's a wired two-headed IR blaster, but after using the Revue's built-in emitters we much prefer them to stringing IR blaster cables.

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Perhaps the most novel non-gaming function of the tablet-esque controller is its IR-based universal remote control ability -- the GamePad can be used to control your HDTV (well, "most" HDTVs) in some basic, but very important, ways.

ENGADGET: Nintendo Wii U review HD