连通

In particular, the sufficiency implies a recent result by Akashi: every compact and totally disconnected dynamical system, expansive or not, can be conjugately embedded into a PSDS.

第五章主要给出了一个动力系统可以拓扑共轭嵌入到乘积符号动力系统中的充要条件，而且证明了该条件蕴涵着Akashi在文[2]中给出的主要结论，并由该条件推出了判断一个拓扑空间完全不连通的充分条件。

Let G be a k-regular connected vertex transitive graph.

设图G是一个κ-正则连通点可迁图。

This observation strenghen to some extent the corresponding result obtained by Watkins, which said that k-regular vertex transitive graph G has a factor with components isomorphic to a vertex transitive graphs if G is not k connected.

此结果在某种程度上加强了Watkins的相应命题：如果κ正则点可迁图G不是κ连通的，那么G有一个因子，它的每一个分支都同构于同一个点可迁图。

The chapter 2 is the main part of this paper,we discussed the Donaldsoninvariants of 4—manifolds 〓,combing with the results given inchapter 1 and using the techniques of standard dimension counting,transversality etc.of S.K.Donaldson.

首先在§2.2就〓（3维环面）讨论了4—流形X的SU（2）Donaldson不变量，在适当假设下证明了X的Donaldson不变量的一个消失定理（定理2.2.1），这一结果推广了Donaldson不变量的连通和定理。

One end of the band spins 120 degrees, takes three turns and connects with the other end, which forms a model of a single side curve of a trefoil knot.

由原来相互独立的三个面变为一个连通的闭和曲面。

The Trefoil knot, a main exhibit in the middle of the hall, is 10 meters wide, 12 meters high, with bandwidth of 1.65 meters. It is made from triangular prism band.

三叶纽结整体宽度10米，高12米，带宽1.65米，是由一条三棱柱带经过三次盘绕，将其中一端旋转120度后首尾相接，由此构成三面连通的单侧单边三叶纽结造型。

Then, in the procedure of triangulation, we introduce the concept of front splitting and discontinus increasing, so that the procedure can be used to form triangular elements within muti-connected domains with arbitrary boundaries and nodes without any regularity.

然后，在将内部结点和边界结点连成三角形的阵面法中提出了生成阵面增长和分裂的概念，使得该方法能够适应于结点疏密程度变化很大的任意边界内的三角形网格的生成，并能够自动处理多连通域问题。

Connect joint of mechanical seal with shaft seal water pipeline (For newly installed shaft seal water pipelines, please clean up or rinse out sundries such as welding dregs, sand which are remnant in pipelines in advance). Start shaft seal pump, unclose shaft seal pipeline valve and turn pump shaft by manpower, if leakage, that indicates dunghill exist on shaft seal end-cover, here gland bolts should be loosened to wash mechanical seal with clean water and then impact gland.

将机械密封的接口连通轴封水管路(新安装的轴封水管路应事先将残存在管路内的焊渣，泥沙等杂物清理或清洗干净)，启动轴封泵，打开轴封水管路阀门，人工转动泵轴，如有滴漏现像说明轴封端面有脏物存在，应将压盖螺栓松开用清水冲洗机械密封后，再将压盖压紧。

Connect joint of mechanical seal with shaft seal water pipeline (For newly installed shaft seal water pipelines, please clean up or rinse out sundries such as welding dregs, sand which are remnantin pipelines in advance). Start shaft seal pump, unclose shaft seal pipeline valve and turn pump shaft by manpower, if leakage, that indicates dunghill exist on shaft seal end-cover, here gland bolts should be loosened to wash mechanical seal with clean water and then impact gland.

将机械密封的接口连通轴封水管路（新安装的轴封水管路应事先将残存在管路内的焊渣、泥沙等杂物清理或清洗干净），启动轴封泵、打开轴封水管路阀门，人工转动泵轴，如有滴漏现像说明轴封端面有脏物存在，应将压盖螺栓松开用清水冲洗机械密封后，再将压盖压紧。

Effective porosity is the porosity available to free fluids, excluding unconnected porosity and space occupied by bound water and disseminated shale.

有效孔隙度是指适用自由流体的空隙度，它不包括不连通的空隙度和周围水以及浸染泥岩占有的空隙度。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。