countably compact set

例句：

1. 1. The researchers foundthat the countably compact set of data is crucial for their analysis.
   研究人员发现，数据集合的可数性对于他们的分析至关重要。
2. 2. The team decided to use a countably compact set to store and retrieve information.
   团队决定使用一个可数的紧凑集合来存储和检索信息。
3. 3.The countably compact set of elements was used to solve the problem efficiently.
   元素集合的可数性被用来高效地解决问题。