订阅将在一段时间后失效，比方说，24小时，或将其作为一个参数传入。

The subscription would lapse after, say, 24 hours, or that could be passed in as a parameter.

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这个程序使用了集合和一个参数数据段。

The program used summation over sets and a parameters data section.

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由于shmseg内核参数被设得太低，有些共享内存段不能适当地分配。

Because SHMSEG kernel parameter is set too low, some Shared memory segments could not be allocated properly.

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