公共物品只是某一特定集体的公共物品，具有一定的区域性。

Public goods are those that belong to a specific collective which is characteristically local.

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将具有指定区域性特定格式的数字的字符串表示形式转换为它的等效单精度浮点数字。

Converts the string representation of a number in a specified culture-specific format to its single-precision floating-point number equivalent.

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