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1·The six-membered rings exhibit slightly distorted chair, extremely distorted chair and half-chair conformation respectively.

六元环分别呈现微扭曲的椅式构象、严重扭曲的椅式构象及半椅式构象。

2·Then I re-membered the guns which made a lot of smoke.

这时我想起枪可以产生很多烟雾。

3·The six-membered ring of each kind of metals is the most stable.

三种元素的六员环短-长键交替结构都是各自环簇中最稳定的结构。

4·Compound 6 is a 1d double helical chain containing 20-membered rings (6).

化合物6是一维的双螺旋结构，由20元环状结构单元组成。

5·If you are in 3 membered family, you would spend a lot of money on mobile phone.

如果您的家庭有3位家庭成员，你将会为之承担很大一笔开销。作文地带有翻译的英语作文网站。

6·Two 7 - membered ring derivatives of S-(-)-2,2'- binaphthyl - diol, were synthesized.

以S-（-）-2，2’-联二萘酚为手性模板分子，合成出了它的两个七元环衍生物。

7·Q1 represents optionally substituted, saturated or unsaturated 5- or 6-membered hydrocarbyl, etc.

Q 1 是可被取代的饱和或不饱和的5-或6-元环烃基等；

8·This article reviews the ring opening reaction of five membered nitrogen containing heterocyclic compounds.

综述了近年来各种五元氮杂环的开环反应及其在有机合成中的应用。

9·The result shows that the transition state of the rearrangement reaction has a three-membered ring structure.

结果表明，该重排反应经过一个三元环过渡态。

10·Compounds having five-membered heterocyclic rings include chlorophyll, hemoglobin, indigo, tryptophan, and certain polymers.

五种成分的杂环化合物有叶绿素、血红蛋白、靛蓝、色氨酸和特定的聚合物。