5 CDs were first sold to the public in l982.These CDs still play well and sonnd 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 CDROMs.
词汇:
bump n.隆块,隆起 floppy disk软盘
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
注释:
1.he is right in that sound is actually rdcorded onto the CDs as special numbersa digital code:他说的对,因为实际上声音以特殊的数字的形式,即数码,刻录在CD碟片上。in that是因为,如:Water is essential in that without it all living things would die.
2.CD player:CD播放机
3.as you would do with a floppy disk:就象你使用软磁盘一样
4.CDROM stands for Compact DiscRead Only Memory:CDROM是Compact DiscRead Only Memory这五个词首字母的组成的缩写词。
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