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。

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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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Less than two months later, James McDivitt and Ed White went into space on the second Gemini flight.

VOA: special.2009.06.24

The James Webb Space Telescope, named after NASA's second director, will have a mirror seven times the size of the Hubble Space Telescope.

VOA: special.2011.05.23

In nineteen sixty-five America's space agency,NASA, was ready to begin its second manned program.

VOA: special.2009.06.24

During his time at Chichester, he raised money to build and open the West Sussex theatre's second space, The Minerva Theatre, from where many productions have transferred to London.

BBC: Patrick Garland and Alexandra Bastedo

"To be second in space is to be second in everything, " he told the President.

BBC: The magic of Apollo

However, it was the second failed space launch in Russia in less than 10 days.

CNN: Russia postpones new manned space station mission