另一个小型支持函数仅仅从(伪)xpath表达式中解析出索引值，这里就不再重复了。
Another small support function simply parses out index values if they are given within a (pseudo -) XPath. I will not bother reproducing that here.
是否有机会在伪随机数生成中获得重复的数字？
Is there any chance for getting repeated Numbers in Pseudo Random number Generation?
本发明能够降低长码和伪电子序列号出现重复的概 率。
The invention can reduce probability of repetition of the long codes and the pseudo-electronic serial numbers.
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