genericClosure implements a worklist algorithm. Give it a starting set of nodes and an operator function. The operator receives each node and returns new nodes to explore. If a key has already been seen, the node gets skipped. The result is every node visited, in discovery order.
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Момент удара ракеты по спутниковой станции в Израиле попал на видео20:56
### The Signposted Conclusion，详情可参考新收录的资料