Second-countable space
- 第二可数空间（第二可数空间是指有一个可数基的拓扑空间，我们也将“具备可数基”这一性质当作一条公理放在第二可数空间的定义中）
Second-countable space
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abstract:
In topology, a second-countable space, also called a completely separable space, is a topological space satisfying the second axiom of countability. A space is said to be second-countable if its topology has a countable base.
以上来源于:
WordNet