This model is never an exactrepresentation of reality, since modeling errors are inevitable.
模型不是一个准确的实体表现，模型的误差是不可避免的。
2
You mention that you want an exactrepresentation of a float with respect to the number of decimals.
你说你想要一个相对于小数精确表示数浮。
3
Hence, even though the exactrepresentation of a message is different in the two technologies, the code required to access the message content is similar.