个别数据结构的内存需求可能会发生改变，这依赖于编译器中实现对齐的方式。
The memory requirements of individual data structures might get altered, depending upon the way packing is implemented in the compiler.
索引结构可以为个别包查找提供良好的性能，但SACK选项可能会覆盖包括多个包在内的任意多的字节数。
The index structure will give good performance looking up individual packets, but a SACK option can cover arbitrary byte ranges that include multiple packets.
因为我们希望SOAP平台和语言无关，所以XSD没有为某种个别语言才有的编码对象和结构定义格式。
Because SOAP is intended to be platform and language neutral, XSD does not define formats for encoding objects or structures unique to a single language.
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