In some cases, you might be dealing with a dirty laser in your CD or DVD deck; more often, however, the culprit is a scratched disc.

在某些情况下，你可能应清理CD盒或DVD盒内的脏光头；然而，大多数情况是，罪魁祸首是划了的碟。

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Blu-ray and HD DVD are similar in technology. Both use a blue laser to read the information on the disc.

蓝光影碟机和高清数字影碟机采用了相似的技术，都用蓝色雷射光读取影碟上的信息。

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In recent years, we have even had to be forced kicking and screaming into our directors' commentary for a DVD release, something that used to be a very special thing back in the laser disc days.

近几年我们甚至不得不被逼迫在DVD发行版的导演评论中手舞足蹈、大喊大叫，这在激光碟的年代是很少见的。

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Nine consumer electronics firm agreed in February to standardize and promote a new format called "Blu-ray Disc" that uses a shortwave blue-violet laser to read more than two hours of high-definition content stored on a DVD-size platter.

FORBES: What's Coming

But they cannot use laser-disc players to watch movies on SD.

CNN: ASIANOW - Asiaweek

Such heterostructures are widely employed to make the lasers in compact-disc players and retailers' laser scanners.

ECONOMIST: Microelectronics