您要查找的是不是：
- compactly closed subset[compactly open subset] 紧闭子集[集开子集]
- 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；
- There is not an open closed non-empty proper subset in the Rn Rn中不存在既开又闭的非空真子集
- 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。
- Notice whether examination ball bearing is quick at the same time, of the door open close deft, frame combines the stainless steel screw that whether uses. 同时注重检查滚珠轴承是否灵活，门的启合是否方便轻便，框架组合是否用的不锈钢螺丝。
- They cited as one step the passage by Congress in 1988 of the Omnibus Trade and Competitiveness Act, which contained some reciprocity provisions and other measures designed to open closed foreign markets to U.S. exports. 他们举出1998年国会通过“综合贸易与竞争力法”作为一个例子，该项法案包含某些互惠条款和其他措施，以便开放对美国产品一向关闭的外国市
- 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。
- Once the appropriate sample size has been determined, the Degas inspector should select sample garments by randomly opening closed cartons. 从一决定性的数量目标来决定检查员要开箱抽查货物。
- Open a window it's very close in here. 打开窗户吧－－这里很闷气。
- And the hardware with good quality the every time that can allow cupboard door is opened close issue rule of canorous rhythm He Yun. 而品质优良的五金件能让柜门的每一次启合发出音乐般的节奏和韵律。
- After he has closed the window, we open the cage door. 他关了窗之后，我们把笼门打开。
- Pea pods burst open when overripe. 豌豆过熟就会爆裂。
- Open tender for purchasing power transformer. 公开招标购买电力运输设备。
- 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。
- We bivouacked on the open plain. 我们在开阔的原野上露营。
- For many years laser peripheral iridoplasty is a simple and an effective means of opening closed angle when laser iridotomy can not be performed or dose not physically eliminate angle closure. 许多年以来,人们一直寻找各种方法打开房角,降低眼压。激光周边虹膜成形术就是简单而有效的打开房角的方法。
- Thank you. How long will this offer be open? 谢谢。这个报价的有效期多长？
- Open the shutter and see what the weather is like. 打开百叶窗，看看外面的天气如何。
- Since mediaeval times, velar and guttural and its opening closing mouth have had many transformations. 中古以来牙喉音及其开合口发生了许多变化。
- The fresh air blew in from the open window. 新鲜空气从开着的窗户吹进来。
