Passing valid data avoids meta-character problems.

传递有效数据，防止元字符的问题。

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This brings us to a very common problem — meta-character vulnerability.

这为我们带来了一个非常常见的问题：元字符漏洞。

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SQL injection is essentially the same problem as the shell meta-character one, but with an SQL interpreter instead of the shell.

SQL注入本质上与shell元字符的问题是相同的，不过它是由SQL解释器进行解释的，而不是由shell进行解释的。

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