scanf系列函数具有一个最大宽度值，至少IEEE Standard 1003 - 2001清楚地规定这些函数一定不能读取超过最大宽度的数据。

The scanf family of functions has a maximum width value, and at least the IEEE Standard 1003-2001 clearly states that these functions must not read more than the maximum width.

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先进的量测能力提供对RF功率，频率，脉冲间距，脉冲宽度和VS WR的精确数字读取。

Advanced measurement capability provides precise digital readout of RF power, frequency, pulse spacing, pulse widths and VSWR.

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你想存取字符串的一部分。何如，你读取了一条固定宽度的记录，然后从中提取出其中的字段。

You want to access portions of a string. For example, you've read a fixed-width record and want to extract the record's fields.

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