环带的

The ecosystem of saline includes briny region and annulus lake salina to take two inferior system.

盐湖的生态系统包括盐水域和环湖盐沼带两个亚系统。

Synthesis of ethyl caproate by a strong acid cation exchange resin catalyst

研究了以强酸性阳离子交换树脂为催化剂，环己烷作带水剂，冰醋酸与异戊醇合成乙酸异戊酯的反应条件。

They consist of two switches and a control rod with two moveable collars.

它们包括两个开关和一个带两个活动轴环的操纵杆。

Diamond wedding bands,platinum bands,Bridal Jewelry and Rings,all styles of ...

钻石婚礼乐队，铂金带，婚纱及饰品环，所有的风格。。。

In this paper, it presents double loop controller with current feed-forward based on Buck DC-AC inverters.

针对Buck DC-AC逆变器，提出一种带电流前馈的双环控制器。

The results demonstrate that ACM-A is capable of intercalating between the base pairs of DNA double helix, the π-π electronic overlapping between π-electron of ACM-A and DNA stabilizes the ACM-DNA adduct, and through electrostatic interaction, the trisaccharide interacts with the minor groove of DNA owing to C(3') amino group.

实验结果表明，ACM-A主要以其蒽环平面嵌入DNA双螺旋碱基对之间，发生-等电子间相互共轭，同时药物糖基上C3'位的-N(CH3)2基团带正电荷，易与带负电荷的磷酸骨架产生静电吸引，从而发生沟槽作用，嵌入DNA的小沟区，这是二者之间的主要结合模式。并且，DNA与ACM-A药物原型的亲和力要强于还原后的药物代谢产物。

A method for eliminating the internal oxide structure in the gas-phase carbon-nitrogen osmosis of gear features that the CCL4 is added to the kensene as carburizer and then is decomposed to generate Cl2 for reducing the oxide, the ammonia gas as nitrizing agen passes through the cylinder of silica gel or granular calcium chloride for adsorbing residual water vapour and then through the cylinder of 5A molecular sieve for adsorbing residual O2, and the resistance wire is wound on igniting pipe at furnace top to prevent the NH4Cl in exhausted gas from being condensed.

本方法采用在气体渗碳剂煤油中，加入6～8％的CCl 4 ，使共渗炉内的CCl 4 分解出新生的Cl 2 ，使已形成的合金元素内氧化物还原；在渗碳剂氨气入共渗炉前，先经过硅胶瓶或桶及粒状氯化钙瓶或桶过滤，吸附掉氨气中的残留水蒸汽，再经过5A分子筛瓶或桶吸附掉氨气中的残留氧；在靠近炉顶位置的点火管周围缠绕带瓷环的电阻丝，靠电阻丝的副带加热，使排气中的NH 4 Cl不冷凝结块等措施实现内氧化组织的消除。

According to the distribution of the positive charges inthe surface of the cage, it can be expected that two -OH groups finally adding at two sites which arewithin one hexacyclic ring and in different sides of equator, which is accord with the conclusion resultedfrom thermodynamics

通过寻找并分析过度态的结构，发现酸化阳离子中处于赤道带6-6类碳原子上的羟基和两极区域5-5类碳原子上的羟基都有朝邻近赤道带碳原子上迁移的可能，结合碳笼上正电荷的分布特征，预计亲核水解作用将发生在赤道异侧六员环的对位，说明考虑动力学因素，最终获得1，4-加成富勒醇的可能性最大，该结论与热力学的结果一致。

The experimental results showed that this dissertation has certain practical importance for qualitatively analyze draft tube pressure fluctuation.

对引起尾水管涡带压力脉动的转轮出口环量计算公式进行了简化，也对描述压力脉动两个主要特征参数频率和振幅的计算公式做了尝试性的简化推导，并且通过实例计算说明，本文所做的尝试性的工作，为定性分析尾水管涡带压力脉动特性有一定的实用价值。

Through the analysis and contrast between HM core and Dh core, combined with the data of AMS14C, six pollen assemblages were ploted Out. At the mean time, six stages about the vegetation change and climate fluctuation were rebuild. In addition, there were three sub-assemblages ploted out in the Atlantic period, Sub-Boreal period and Sub-Atlantic period, which reflected the less vibration of the large-scale climatic change. Pollen assemblage dominated by Concentricystes in the hard and green clay of late Pleistocene can make it sure that the hard green clay layer was formed by water.

通过对上海地区鹤鸣孔和东海1井两个钻孔进行孢粉分析鉴定和对比，结合AMS14C测年等资料，划分出了6个孢粉组合带，恢复了本区的植被演化和气候波动的6个阶段，对鹤鸣孔的大西洋期、亚北方期和亚大西洋期各划分出了两个孢粉组合亚带，反应了大气候环境下气候的次一级波动，在晚更新世晚期的硬绿色粘土中还发现了以环纹藻为主的孢粉组合，从孢粉学角度上证实了这一硬绿色粘土层&水成沉积&的观点。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失