问题就在于此：数字签名依赖于字节级的等价测试，但是可能有两个逻辑上相同但包含不同字节序列的XML文档。
Herein lies the problem: Digital signatures rely on byte-level equivalence, whereas it is possible to have two XML documents that are logically the same, but contain different byte sequences.
有些模式逻辑上是等价的，但是用途却不同。
Some modes are logically equivalent but differ in their purpose.
通过这种比喻，就可以从逻辑上断定：闪电是云际通信的天气系统等价物。
With this metaphor, it could be logically asserted that lightning is the weather system equivalent of communication among clouds.
应用推荐