浮点数的表示精度要比定点数高的多。

Floating-point precision than that of fixed-point higher.

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HTTP 内容协商使用短浮点数来表示各种可协商参数的相对重要性（或权重）。

HTTP content negotiation uses short floating point numbers to indicate the relative importance, or weight, of various negotiable parameters.

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IEEE 754用科学记数法以底数为2的小数来表示浮点数。

IEEE 754 represents floating point Numbers as base 2 decimal Numbers in scientific notation.

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