5 CDs were first sold to the public in 1982. These CDs still play well and sound fine. Current CDs are expected to last between 70 to 200 years. Of course, you can make sure your CDs last a long time by taking care of them.
6 Science keeps on developing. It may not be many more years before a completely new technology is invented5 and introduced to the public for music recording. In the meantime, there is no doubt you will continue to enjoy listening to your favorite music on CDs6 and playing your favorite computer games on CD-ROMs.
词汇:
bump n. 隆块,隆起
floppy disk 软(磁)盘
spiral adj. 螺旋形的
format n. 格式
probe n. 探测器
dye n. 染色
floppy adj. 松软的
permanently adv. 永久地
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