universal covering group是什么意思

网络释义

用法例句

Relations of central extensions and 3-cocycle of Lie triple system are studied,and the concept of universal covering of a Lie triple system is introduced.

研究了李三系的中心扩张和3-上循环的关系,引入了李三系的泛覆盖,并建立了李三系存在泛覆盖的充要条件。

The influence of pack ply-rolling process and heat-treatment on the microstructure, tensile properties and fatigue properties of Ti-6Al-4V alloy sheets was studied .

研究了包覆叠轧加工及热处理工艺对Ti-6Al-4V合金室温拉伸及疲劳性能的影响规律,观察分析了不同状态下组织形貌的特征及变化情况。

It is investigated that the relationship between the asymptotic pseudo orbit tracing property for continuous map f on a compact metric space X and that for the lift map of f on a covering space of X and show that (,) has the asymptotic pseudo orbit tracing property if and only if (X,f) has asymptotic pseudo orbit tracing property.

又设X是X的覆叠空间,f:X→X是f的提升映射。

"In Great Britain, the communication media press, publishing, broadcasting, and entertainment-provide mass coverage, but their scale varies"

在英国，包括报刊、出版、广播电视和娱乐的传媒具有广泛覆盖面，但其规模有所不同:

Since it has such a vast reach,

由于因特网覆盖广泛

Discussion About Coverage Metrics of Generic Program

关于泛型程序的覆盖度量方法的探讨

Syntactic Template Auto-extraction Based on Generalization、Specialization and Overlay Algorithm;

基于泛化特化和覆盖算法的句法模板自动提取

To cover with a thin protective layer.

覆盖以薄的保护层覆盖

New geochemical methods-NAMEG (collection of nanoscale metals in earthgas) and MOMEO (leaching of mobile forms of metals in overburden) have been developed.

这两种方法在各种景观覆盖区被广泛地加以试验与应用。

To cover or surround with mulch.

覆盖用覆盖层覆盖或包围

covering property

盖染性,遮盖性,被覆性,覆盖性

Cut and cover method

明挖覆盖法（隧道）

"They are widely eaten fresh, cooked, or Baked in pastries. In full Bloom, plum trees are covered with densely packed, showy flower clusters. "

广泛用于鲜食、烹煮或烘烤酥皮糕点之用。花朵盛开时,李树被艳丽的团团花簇所覆盖。

There were more evacuations in Missouri where levees have been topped by rising flood waters.

在密苏里州，因洪水泛滥许多防洪堤被水覆盖了，越来越多的居民都搬迁了。

The following paper will focus on one expanding use of plastic in producing high-yielding and high-quality crops plastic for mulch.

本文主要讨论塑料在高产优质作物生产中一种日益广泛应用的覆盖用塑料。

Wide resection of advanced breast cancer usually results in extended defect of the anterior chest wall and finding an appropriate soft-tissue to close such defect is still a difficult task.

晚期乳癌经广泛切除术后常造成前胸壁大面积缺损，而移植软组织来覆盖此缺损仍十分困难。

The shipping company and holding logistics companies under the Group deliver the barging services to the whole PRD.

下属有船务公司和控股的物流公司，内河支线航班覆盖泛珠江三角洲。

biennial yellow-flowered Eurasian plant having aromatic leaves used as carminative or flavoring agent; widely cultivated especially as green manure or cover crop.

两年生欧亚植物,花黄色,其叶芳香,用做祛风剂或调味品；广泛栽培,尤其作绿肥或覆盖作物。

Enhancing the Cultivation of High-Quality Workforce--Constructing Various and Extensive Talents Cultivation System;

注重“高素质劳动者”的培养教育——构建形式多样、覆盖广泛的人才培养体系

To cover, line, weight, or fill with lead.

以铅覆盖用铅覆盖、划线、加重或装满

To cover with or as if with fleece.

用羊毛覆盖用羊毛或象用羊毛覆盖