The parameterlength was not received during initialization of the extended stored procedure.
初始化扩展存储过程期间，未接收到参数长度。
2
The method takes a parameter, specifying the length of the timeout, and a code block, specifying which content to rebuild when the content expires.
此方法接受参数，用来指定超时的时长，它还接受一个代码块，用来指定当内容过期时哪些内容需要重建。
3
You'll recognize several parameter expansions, including length, substring, pattern matching, and pattern replacement in even this short piece of script.