Scan out the fraction part as a string.

扫描出一部分作为字符串的一部分。

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It is usually safer to scan a string forward rather than in reverse.

通常向前扫描字符串比反向扫描更安全。

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It is usually safer to scan a string forward rather than in reverse.

通常向前扫描字符串比反向扫描更安全。

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