为什么葵花的小花呈双螺旋型排列呢？
Why are the florets in a sunflower arranged in a double spiral?
这些结构是由一束束双螺旋DNA链构成。
The structures are made from bundles of double-helix DNA strands.
他们在1953年构建了第一个DNA双螺旋结构。
They created the first double helix model of DNA in 1953. Photograph: ap.
双螺旋上并发生断裂，使得基因组变得更不稳定。
Breaks appear in the double helix, destabilizing the genome further.
最后，通过离心铸造生产出双螺旋辊式磨浆机筒体。
At last, cylinder of double spiral roller grinded-paste machine is produced by centrifugal casting.
最经典的例子莫过于生物学中的双螺旋结构和物理学中的基本方程。
Examples include the double helix in biology, and the fundamental equations of physics.
结论：双螺旋CT能清楚显示肝移植术后的并发症影像。
Conclusion: Double spiral CT can display the complications after liver transplantation.
从结构上讲，DNA是由两条链相互缠绕构成弹簧状结构称为双螺旋。
Structurally, DNA is composed of two strands that intertwine to form a spring-like structure called the double helix.
正常的双螺旋DNA是螺旋形的，像一根松松地卷曲的弹簧。
Normal, double-helix DNA is spiral , like a loosely coiled spring.
齿轮制图标准。第1部分：正齿。螺旋齿。双螺旋齿和齿条。
Gear drawing standards - part 1: for spur, helical, double helical and rack.
目的：确定慢性化脓性中耳乳突炎的双螺旋CT扫描诊断价值。
Purpose To recognize the value of double helix CT in diagnosis of Chronic otitis mastoidea.
用于制造双螺旋或三螺旋荧光灯丝、普通白炽灯丝、支架丝等。
Applied for making coiled-coil or trispiral CFL filament, incandescent filament and support.
DNA是地球上所有生命的基础，它有着像螺旋式楼梯一样的双螺旋结构。
DNA is the basis of all life on earth. It has a double helixstructure， like a spiral staircase.//
提出了一种将混沌系统的单螺旋结构转变为双螺旋结构的新方法。
A novel method of transforming single-scroll to double-scroll structure of a chaotic system is introduced.
DNA（脱氧核糖核酸）的分子是一种双螺旋结构，酷似一架沿纵向扭曲的梯子。
The DNA molecule is a double helix, resembling a ladder that's been twisted along its length.
脱氧核糖核苷酸以共价键连接起来的链。双螺旋由两条DNA链组成。
A covalently linked chain of deoxribonu- cleotides. The double helix is composed of two DNA strands.
分离方式：采用阿基米德螺旋离心分离，双螺旋更利于渣液分离，不易堵塞。
Separate method: Archimedes spiral centrifugal force. Double spiral is more advantageous to part liquid dreg and not easy to block.
对所有患者均进行双螺旋CT扫描，分别获取血管相和肝脏最大强化相影像。
Helical CT scan images were obtained in the vascular phase and the maximal hepatic enhancement phase.
在不久之后写给克里克的另一封信中，威尔金斯气急败坏的指责富兰克林没能早点发现双螺旋结构。
Another letter to Crick, written soon after, reveals Wilkins's exasperation that Franklin had not discovered the double helix sooner.
信件里的一段文章在周三由自然杂志刊发，内容侧重于与1953dna双螺旋结构的发现有相关的模型。
An article on the letters was published Wednesday in the journal Nature, focusing on those related to the discovery of DNA's double helix structure in 1953.
采用双螺旋和球磨两种混料方式，研究不同混料时间对（铝）热剂性能及颗粒微现形态的影响。
Properties and morphology of thermites mixed up by twin-screw and ball milling procedures are investigated with different mixing time.
发热部是双螺旋切槽，在电流通过时可以减少其横截面积，因而发热部的阻值比冷端部的阻值大。
The hot zone is formed by cutting a double spiral slot which reduces the cross sectional area through which current flows, resulting in higher resistance than the cold end.
事实上，在1950年当沃森博士合作发现DNA的双螺旋结构的时候，他的断言的确有一定的道理。
In truth, Dr Watson, co-discoverer of the double-helical structure of DNA back in the 1950s, had a point.
从摩尔根发现染色体是基因的载体，到DNA双螺旋结构的发现，你能在看完展览后说出其中的奥秘吗？
Morgan found from chromosomes are gene carrier, to DNA double helix discovery, you can read them out in the mystery of exhibition?
由于S NPK装置扩能，使磷酸生产的副产品磷石膏增加，致使输送磷石膏的双螺旋输送机常发生故障。
The S-based NPK capacity enlargement leading to the increase of phosphogypsum in phosphoric acid production, mechanical faults occurred to the twin screw conveyor.
丹麦馆是采用双螺旋结构造型，其人行道和车行道，从地面盘旋两次到达12米的高度，又盘旋而下回到地面。
The pavilion is a double spiral with pedestrian and cycling lanes that takes the visitors from the ground through two ramps, up to a level of 12 meters, and down again.
丹麦馆是采用双螺旋结构造型，其人行道和车行道，从地面盘旋两次到达12米的高度，又盘旋而下回到地面。
The pavilion is a double spiral with pedestrian and cycling lanes that takes the visitors from the ground through two ramps, up to a level of 12 meters, and down again.
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