However, there are many different aspencts between CD-R and DVD-R, They both need perfect quality control.

尽管CD-R和DVD-R之间存在着很多的不同，它们都需要完善的品质控制。

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The article took the DVD, CD-R and CD-W for examples, and then illustrated the testing methods and functions of the test media in the mechanical, optical and electronic performance tests.

本文以DVD、 CD-R、和CD-W媒体设备为例，论述了测试媒体在测试机械性能、光学性能、 电子性能方面的测试方法和功能。

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To protect against accidental data loss, you should backup your data frequently on more than one type of storage media such as CD-R, DVD-R.

为防止资料因意外而遗失，应经常把资料在多种储存媒体（如 CD或DVD）上作备份。

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DVD-R: This is a one time only recordable format, similar to burning CDs with a CD-R.

FORBES: Standards tangle

But while CDs can only hold a maximum of 650 megabytes, Pioneer's DVD-R disc, already available, holds nearly 4 gigabytes of information.

FORBES: Standards tangle

The player supports several types of discs including DVD-Audio, DVD-RAM, DVD-R, CD-R and CD-RW. There's also an SD Memory card slot, so you can look at photos you may have saved from a digital camera.

FORBES: Magazine Article