Some of the typical string-related checks would validate whether an empty string has 0 length, accessing out-of-index results in an error message or exception, and so on.
与字符串相关的一些典型的检查，会验证空字符串的长度是否为 0，访问范围超出索引是否导致错误消息或异常，等等。
A validation error is generated if the combined strings exceed the length of the first string.
验证错误，如果合并生成字符串的字符串长度超过了第一。
A validation error is generated if the combined strings exceed the length of the first string.
验证错误，如果合并生成字符串的字符串长度超过了第一。
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