Only integer numbers including exponent are converted, and ISO 8601 dates and times in their extended formats with separators. Anything else, like fractional numbers with decimal separators or dates other than ISO 8601, is not converted, as the text string would be locale dependent. Leading and trailing blanks are ignored.
只有包含指数的整型数字会被转换，ISO 8601 日期和时间将采用带有分隔符的扩展格式。此外，由于文本字符串依赖于区域设置，像带有小数分隔符的分数或 ISO 8601 以外的日期都不会被转换。前导空格和结尾空格将被忽略。