1. 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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2. 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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3. I went to a computer shop and bought two DVD-R DL disc in case one if it fails to burn, at least I still have another one to try before going to shop and buy more DVD-R DL discs.
我去了一个电脑商店买了两个DVD - RDL的光盘案件之一，如果它未能烧伤，至少，我还有另外一个来尝试才去商店，并购买更多的DVD - R DL光盘。
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4. 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.
5. 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.
