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This showed that the electron density of a quinoid ring increased. The peaks of the quaternary carbon atoms of the benzene rings, which were adjacent to the quinoid ring, also shifted to higher field. But the peaks of other C atoms shifted to lower field.

NMR结果表明苯胺低聚体掺杂后主链上的电荷重新分布，环上的H原子上的电子被C原子吸引，电荷密度降低，在〓 NMR中谱峰向低场移动。C原子的谱峰也相应发生变化，醌环上电荷密度增加，全部C原子的峰向高场移动，与醌环相邻苯环受其影响季碳峰移向高场，非季碳峰移向低场。

Assuming R be a semiprime ring with extended centroid C and Q be the maximal right quotient ring of R, f be a noncentral multilinear polynomial over C.d and δ are derivations of R.

给出了，假设R是带有扩张形心的半素环，Q 为R的极大右商环，f是R的扩张形心C上的非中心值的多线性多项式。

On the other hand, when the radical center is located at the 2-position of bicyclic cyclobutylcarbinyl radicals, ring opening pathway is favored unless a radical-stabilizing substituent is placed in the cyclobutyl ring at the bridge position.

另一方面，当自由基中心位于双环环丁基甲基自由基的2-位时，开环过程占主导地位，但是在双环的桥位上存在能够稳定自由基的取代基时，重排主要进行扩环反应。

When the radical center is located at the bridge methyl group, ring expansion is the favored rearrangement pathway unless a radical-stabilizing substituent is placed in the cyclobutyl ring adjacent to the bridge methyl group.

当自由基中心位于双环的桥甲基时，扩环过程占主导地位，但是与桥甲基相邻的环丁基上存在能够稳定自由基的取代基时，重排以开环为主。

The scheme of reducing furnace height to dismount the front rotary ring in the furnace was introduced in this article, which has been used in practice and reach the objective that the front rotary ring was dismounted and the concrete major beam keeps in good condition.

介绍了降低炉体高度拆装煅烧炉前滚圈的可行性方案，并通过实践检验达到无损建筑物混凝土主梁顺利拆装前滚圈的目的。

Diamond's Ring Leader O-ring chain is specifically designed for applications that don't permit regular lubrication, requiring the chain to depend entirely upon initial factory lubrication throughout its service life.

Diamond 的的 O 型环链是专为应用程序，不允许定期润滑，要求链从初始工厂起，完全润滑在其整个使用寿命中。

Since a ring satisfies the related comparability if and only if every regular element is related unit-regular, In Section 2. 3, we first give some equivalent conditions for an arbitrary ring to satisfy the related comparability.

由于环R满足相对可比性当且仅当R的每个正则元是相对幺正则的，§2.2节给出了一般环中给定的正则元是相对幺正则的一些特征刻画，证明了文献[22]（1997）的主要结果在任意环中仍然成立。

An element of a ring is said to be UR if it is the sum of a unit and a regular element and a ring is said to be satisfying DR-stable range if R has P-stable range and p is the set of all UR-elements of R.

当环的一个元素是一个可逆元和一个正则元之和，则称这个元素为UR。如果环R具有P稳定度且P是环中所有UR元素组成的集合，则称环R具有UR-稳定度。

By, we prove that a separative abelian regular ring is an APT ring.

由，还证明了分离的阿贝尔正则环是APT环。

This includes: home cleanings, regular ring checkups, proper storage and knowing when not to wear your ring.

这包括：家居清洁用品，则环检查，适当的储存和知道什么时候你不戴戒指。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

Talk Undelete failed; someone else may have undeleted the page first.

Talk 无法删除选定的页面或图像（它可能已经被其他人删除了）。