It is only required that the second space is partly ordered topological space and B(D) possess the relatively compactness.
只要求第二空间是半序拓扑空间，B（D）是相对紧集，所得结果推广了近期相关结论。
A small panelled guest room was created for the couple's grandchildren, and a second space has a desk and a sofa bed to accommodate guests.
一间小格子客房是为这对夫妇的孙子辈设计的，而第二个有书桌和沙发床的空间可供客人居住。
A small panelled guest room was created for the couple's grandchildren, and a second space has a desk and a sofa bed to accommodate guests.
一间小格子客房是为这对夫妇的孙子辈设计的，而第二个有书桌和沙发床的空间可供客人居住。
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