Each type of format can take a numerical argument as well, to tell the formatter how to properly apply the pattern.
每一种格式都会用到一个数值实参来告诉格式化程序如何适当地应用模式。
Its only required argument is a numerical distance that identifies how far the extrusion should be performed.
该方法惟一需要的参数是一个数值距离，表明挤压应该执行多远。
Such a conversion can be useful when obtaining numerical input from a command line argument, for example.
例如，当从命令行参数获取数值输入时，此类转换会很有用。
Such a conversion can be useful when obtaining numerical input from a command line argument, for example.
例如，当从命令行参数获取数值输入时，此类转换会很有用。
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