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- To be precise, if you embed a compact Hausdorff space K in an arbitrary Hausdorff space X, then K will always be a closed subset of X;the "surrounding space" does not matter here. 精确地说，将紧致的豪斯多夫空间 K 放在任意豪斯多夫空间 X 中，K 总是 X 的一个闭合子集；
- Let X be a metric continuum and let 2(superscript X) and C (X) denote the hyperspaces of subcontioua and of closed subset of X, respectively, F1(X) is 1-fold symmetric product of X. 摘要给定连续统X,2(上标X),C(X)，分别表示X的闭子集和子连续统的超空间，F1(X)是X的一重对称积空间。
- compactly closed subset[compactly open subset] 紧闭子集[集开子集]
- In this paper the local compactness of the nonempty closed subsets hyperspaces with locally finite topology is discussed. 摘要本文讨论了赋予局部有限拓扑的非空闲子集超空间的局部紧性。
- The main result is as follows: Let X be a regular space, then the nonempty closed subsets hyperspace is locally compact iff X can be represented as the sum of a compact space and a discrete space. 主要结果是：X正则，则其闭子集超空间局部紧当且仅当X可表示成一个紧空间与一个离散空间的拓扑和。
- He closed the deal successfully and was home free. 买卖成交了，他松了一口气。
- People say that the tiger is still lurk close to. 人们说那只老虎还躲在附近。
- The boss readily closed with the offer. 老板马上接受了这个报价。
- Have you closed the gate and windows? 你把门窗关严实了吗？
- He closed his speech with a funny joke. 他用一则有趣的笑话结束了演讲。
- That oyster closed up its valves. 那个牡蛎把壳合拢起来。
- She is buying a flat close to her office. 她正在购买一套靠近她办公室的单元房。
- She's always been very close about her past life. 她对自己过去的生活一直守口如瓶。
- For the umpteenth time close the door quietly. 我告诉过你好多次要轻轻地关门。
- The Waterloo line is closed for repair. 滑铁卢铁路线因维修关闭。
- This project has been closed up. 这个项目已终止了。
- This road is closed to motor vehicles. 这条路机动车不准通行。
- Nuclear physics is a closed book to me. 核物理学是我完全不懂的一门学科。
- Nuclear physics is a closed book to most of us. 我们大多数人对原子核物理学一窍不通。
- He closed his ears to my suggestion. 他对我的建议充耳不闻。
