查询词典 ring

Some properties of this ring are studied and it is proven that if R satisfies UR-stable range then so does any n x n matrix ring over R.

研究了该环的性质，并证明了如果R具有UR-稳定度，则R上的任意n阶矩阵环也具有UR-稳定度。

Its action is different from the Central Materials, 60A and 60C of the actin ring are made of cemented carbide YG6, and 60B of the fixed ring, the matrix material for oCrl8N112M02Ti, sealed in its side surface with a layer of surfacing thickness 1.5mm the hard alloy.

其动环材料有所不同，60A和60C的动环都是由硬质合金YG6制成的，而60B的动环，其基体材质为oCrl8N112M02Ti，在其密封端面上堆焊有一层厚度为1.5mm的硬质合金。

Taking the drawing die for the wheel spoke as an example, a method by adopting the rigid blank_holding ring after refining treatment, and by controlling the clearance between the blank_holding ring and the matrix surface and reducing the curvature radium of the matrix mouth was introduced.

以车轮轮辐拉伸模为例，介绍采用调质处理的刚性压边圈，并通过控制压边圈与凹模平面的间隙和减小凹模口圆角半径的方法，能够实现在普通压力机上直接拉伸，使制件质量稳定、操作简便，并降低了生产成本，提高了材料的利用率。

This invention provides compounds of Formula; wherein: R is a moiety selected from the group: and n is an integer of 1 or 2; R is selected from hydrogen, amino,-NRR, alkyl of 1 to 12 carbon atoms optionally substituted, aryl of 6, 10 or 14 carbon atoms optionally substituted, alkenyl of 2 to 12 carbon atoms optionally substituted, alkynyl of 2 to 12 carbon atoms optionally substituted, halogen, and a 5 to 10 membered heteroaryl ring optionally substituted, having 1 to 4 heteroatoms independently selected from N, O and S; R is selected from hydrogen, alkyl of 1 to 12 carbon atoms optionally substituted, aryl of 6, 10 or 14 carbon atoms optionally substituted, alkenyl of 2 to 12 carbon atoms optionally substituted, vinyl, alkynyl of 2 to 12 carbon atoms optionally substituted and halogen; R is H, alkyl of 1 to 12 carbon atoms optionally substituted, cycloalkyl of 3 to 8 carbon atoms, bicycloalkyl of 5 to 10 carbon atoms or aralkyl optionally substituted; R is OH or -OH; R and R are each independently H or alkyl of 1 to 12 carbon atoms or when optionally taken together with the nitrogen atom to which each is attached form a 3 to 8 membered saturated heterocyclyl ring; R is alkyl of 1 to 12 carbon atoms optionally substituted; or a tautomer or pharmaceutically acceptable salts thereof.

本发明提供式的化合物；其中：R 1 为选自基团和的部分；n为整数1或2；R 2 选自氢、氨基、-NR 6 R 7 、具有1到12个碳原子的视情况经取代的烷基、具有6个、10个或14个碳原子的视情况经取代的芳基、具有2到12个碳原子的视情况经取代的烯基、具有2到12个碳原子的视情况经取代的炔基、卤素和具有1到4个独立地选自N、O和S的杂原子的视情况经取代的5元到10元杂芳基环；R 3 选自氢、具有1到12个碳原子的视情况经取代的烷基、具有6个、10个或14个碳原子的视情况经取代的芳基、具有2到12个碳原子的视情况经取代的烯基、乙烯基、具有2到12个碳原子的视情况经取代的炔基和卤素；R 4 为H、具有1到12个碳原子的视情况经取代的烷基、具有3到8个碳原子的环烷基、具有5到10个碳原子的双环烷基或视情况经取代的芳烷基；R 5 为OH或-OH 8 ；R 6 和R 7 各自独立地为H或具有1到12个碳原子的烷基，或当视情况与其所连接的氮原子连接在一起时形成3元到8元饱和杂环基环；R 8 为具有1到12个碳原子的视情况经取代的烷基；或其互变异构体或医药学上可接受的盐。

The temperature of the zeolite structure damage is at 1169℃.According to the sorption isotherms, hexane and methanol are adsorbed in the ten-membered ring channel. Methanol molecules can enter the small cage through the eight- membered ring window at high partial pressure. The adsorption of water correlates to Si-OH defect and concentration of cations in the zeolites.

吸附现象表明，正己烷和甲醇都被吸附于FER沸石的十元环主孔道中，分压较高时，甲醇可通过八元环进入小笼，而水的吸附性质则主要与各样品的Si-OH缺陷及骨架中的阳离子含量有关。

The outer edge of the B ring which forms the inner boundary of the Cassini division is maintained by a gravitational resonance with Mimas. Near the outer edge of the A ring are the Encke Gap (325 kilometers, or 202 miles wide) and the barely visible Keeler Gap (35 kilometers, or 22 miles wide).

形成卡西尼环缝内缘的B环外侧的形状由其与土卫一的引力共振保持。A环外侧是恩克缝（宽325公里，202英里）和勉强能看到的科勒缝（宽35公里，22英里）。

Taking 17-year-old Ginkgo biloba as test material, the effects of temperature and precipitation on wood ring width, ring density maximum density and minimum density were studied.

以北京地区17年生银杏为试材，研究了气温和降水对银杏木材年轮宽度、年轮密度、最大密度、最小密度的影响。

Its focus ring is a cold, hard, miniscule metel ring, Nikon's worst ever.

它的对焦环是冷，硬，微不足道的金属环，尼康有史以来最严重的。

Let freedom ring from every hill and molehill of Mississippi, from every mountainside, let freedom ring.

"终于自由了！终于自由了！感谢全能的上帝，我们终于自由了！"

In the industries we developed several models star hotel dedicated work plate, nameplates, signs, magnetic-type work plate XI towel ring, napkin ring, is now selling the whole country, the golf gift items has developed dozens of zinc alloy ball forks, elliptical-shaped hat clip, square hat clip, hat clip laser printing departments of cases of product, to be the market recognition.

在行业领域上我们开发了数款星级酒店专用工号牌、铭牌、标牌、磁吸式工号牌、席巾圈，餐巾圈，现已热销全国，在高尔夫礼品方面先后开发了数十款锌合金球叉、椭园形帽夹、方形帽夹、镭射印刷帽夹等系例产品，得到了市场的认可。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。