Methods for determining the ancestor nodes priority number of the expanded node and selecting effectively the ancestor nodes by means of the priority number are also given.

给出了一个包含有向回路的与或图的求解算法，以及如何确定被扩展节点的祖先节点的优先数，并通过优先数有效地选取祖先节点的方法也在本文中给出。

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That's why creating jobs has to be our number one priority in two thousand and ten."

VOA: special.2010.01.30

But he says speed is not necessarily the number-one priority.

VOA: standard.2010.05.10

And I can assure you everybody on this team, everybody sitting around the table has made this a number-one priority and this continues to be my number-one priority.

WHITEHOUSE: Remarks by the President at FEMA Headquarters

He wanted to know why Sport NI's number one funding priority was only number 30 on the department's list.

BBC: Northern Ireland Assembly

And I do think that getting that as part of a jobs package is priority number one.

WHITEHOUSE: President Obama Takes Questions from Senate Democrats