文本格式的XML消息可能是二进制数据带宽量的两倍之多。

XML messages in text format could more than double the amount of bandwidth of binary data.

youdao

而在像evm 2003这样必须有自己的数据格式(而且数据量适中)的项目中，XML再合适不过了。

And in projects like EVM2003 where the self-documentation of data formats is important (and while data volume is moderate), XML fits like a glove.

youdao

字符串必须含有格式所需的确切数据量：len(string) 必须等于 calcsize(fmt)。

The string must contain exactly the amount of data required by the format: len(string) must equal calcsize(fmt).

youdao