An invalid escape sequence error is generated.
生成了一个无效的转义序列错误。
Since the deleted recordId is not reused so as to maintain the original sequence in records, the record is marked as invalid by a distinctive string pattern.
因为为了维持记录中原始的顺序所删除的recordId不能重用，所以这个记录通过特有的字符串模式标记为无效。
A validation rule to handle invalid messages in sequence diagrams has been introduced. The constraint for this rule can be found in this UML 2.2 specification
序列图中处理无效消息的验证规则会得到引入。
If the originating router receives an invalid-number or user-busy code from the destination router, the originating router proceeds to the next dial peer in the sequence.
如果起始路由器接收到空号或目的地路由器的用户忙于编码，起始路由器就开始序列表中的下一个拨号点。
If the originating router receives an invalid-number or user-busy code from the destination router, the originating router proceeds to the next dial peer in the sequence.
如果起始路由器接收到空号或目的地路由器的用户忙于编码，起始路由器就开始序列表中的下一个拨号点。
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