When these three-dimensionally ordered macroporous materials have pore dimensions comparable to the wavelength of visible light, they are of interest as photonic band gaps and optical stop-bands.

当这些三维的有序大孔材料具有孔维度和可见光的波长相当时，它们就可以作为光子带隙和带阻。

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Sony has already announced that it will stop making optical drives itself.

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The camera is always ready to shoot video with its dedicated movie button to start and stop recording HD video instantly and uses the full range of optical zoom when recording, without sacrificing HD resolution.

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