Save this file as ls2.xml.

将该文件保存为 ls2.xml。

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Is the ls2.xml file valid against this new schema?

xml文件对于这个新的模式有效吗？

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Finally, based on OV algorithm, proposes LS2 algorithm, effectively solves the problem of LS algorithm.

最后，以OV算法为基础，提出LS2算法，有效地解决了LS算法的问题。

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