利用超距空间的基本性质及拓扑空间紧致性的相关理论，给出超距空间为紧致空间的充分且必要条件，并讨论了一些相关性质。
A sufficient and necessary condition in terms of the compactness of super-distance space is given based on the property of super-distance space and the related theory of compactness.
必要而充分的条件是合外力矩能量小于最大限度的恢复能量，且合外力不等于零；
What is necessary is resultant moment energy is smaller than maximal rehabilitating energy and is not zero.
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