Even though hard disks are much cheaper compared to 15 years ago when a 250 Megabyte hard disk cost a couple hundred dollars, adding disk drives still incurs a cost to the organization.
虽然与十五年前相比(那时候一个250MB的硬盘就要花费200美元)，硬盘的成本降低了很多，但是对于企业来说，增加磁盘驱动器仍然需要一笔不容忽视的成本。
If you must deal with many-megabyte XML documents, it's often impractical to spend the memory, disk space, and CPU overhead to manipulate such huge documents.
若必须处理许多兆字节的XML文档，花费内存、磁盘空间和CPU开销来操作这么大的文档通常是不实际的。
The cost per Megabyte of hard disk storage is competitive with magnetic tape if only one tape is used per drive.
硬盘存储的每兆字节成本与磁带不相上下，如果每个驱动器只用一条磁带。
The cost per Megabyte of hard disk storage is competitive with magnetic tape if only one tape is used per drive.
硬盘存储的每兆字节成本与磁带不相上下，如果每个驱动器只用一条磁带。
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