现时标志通常能实现为计数器(一个序列数)或者时间戳。
Typically, the nonce can be implemented as a counter (a sequence number) or as a timestamp.
还给出了混合模块级联序列数的公式和应用实例。
The formula of modular cascade sequence number and an application example was given.
每个移植文件开始的序列数都比前面的移植文件大，并且该数字符合位于数据库特殊表中的方案版本。
Each migration file starts with a sequence number one greater than the previous migration file, and that number corresponds to the schema version kept in a special table in the database.
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