它们源自休斯敦约翰逊航天中心录制的原始录音磁带，这些录音磁带最近被重新数字化，使之成为未压缩的高保真录音。
They have been taken from the original magnetic tape recordings made at Johnson Space Center, Houston, which have recently been re-digitised to make uncompressed, higher-fidelity audio recordings.
在过去的一百年间，音乐的录制经历了圆筒式录音、78转虫胶唱片、密纹唱片、磁带到现在的CD和数字下载。
In 100 years, recorded music has gone from cylinders to shellac 78s to vinyl LPs to cassettes, CDs and now digital downloads.
但是我们用今天的记录技术以盒式磁带音带和数字化视频光和激光唱碟和MP3录音能来真正的结束。
But we can come real close with today's recording technologies with cassette tapes and DVD and CD and MP3 recordings.
数字录音磁带(DAT)推出。
索尼在30年卖了385百万个随身听录音机机器全世界，它从演奏卡式磁带演变了对雷射唱片然后迷你激光唱片-CD的一个更小的版本-和最后数字式文件。
Sony has sold 385 million Walkman machines worldwide in 30 years as it evolved from playing cassettes to compact disks then minidisks - a smaller version of the CD - and finally digital files.
索尼在30年卖了385百万个随身听录音机机器全世界，它从演奏卡式磁带演变了对雷射唱片然后迷你激光唱片-CD的一个更小的版本-和最后数字式文件。
Sony has sold 385 million Walkman machines worldwide in 30 years as it evolved from playing cassettes to compact disks then minidisks - a smaller version of the CD - and finally digital files.
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