There are 3 types of shapes: helical, icosahedral, and complex.

螺旋对称、二十面体对称与复合型。

And they can have 3 types of shapes: helical, icosahedral, and complex.

他们可有三种形状：螺旋对称、二十面体对称与复合型。

Genes, in turn, are made of DNA, helical strands of compounds called nucleotides that contain chemicals called bases.

反过来，基因是由DNA，即核苷酸的螺旋链组成，核苷酸含有一种叫做碱基的化学物质。

Sometimes magnetic fields can twist plasma in the Sun's atmosphere into majestic helical shapes called " flux ropes" .

有时磁场会将太阳大气层中的的等离子体扭曲，成为被称做“通量绳”的宏伟的螺旋体。

An example of a virus with helical symmetry is the tobacco mosaic virus, which is the most studied example.

螺旋对称型病毒的典型代表是烟草花叶病毒，这是研究最多的一种病毒。

This is why some chimneys are equipped with helical vanes to create turbulence and break up the vortices.

这就是为什么一些烟囱配备了螺旋叶片来产生湍流并打破涡流。

Finally, the complex viruses have a combination of icosahedral and helical shape and may have a complex outer wall or head-tail morphology.

最后，复合型病毒兼具二十面体和螺旋对称结构，可能有复杂的外壁或头尾形态。

Or held in orbits by the invisible force of gravity? Or are they following helical paths which are actually straight lines in curved spacetime?

还是被无形的地心引力控制在轨道上？它们是沿着在弯曲时空中实际上是直线的螺旋路径移动吗？

This invention, crafted meticulously with a coiling helical surface around a cylindrical shaft, transformed irrigation, a boon to the agrarian societies of the time, and even today.

这项发明以围绕圆柱轴的盘绕螺旋面精心制作，改变了灌溉方式，为当时乃至今天的农业社会带来了福音。

At the end of a minute a dull splashing reverberated from the bottom of the well; the helical twist he had imparted to the rope had reached the grapnel below.

一分钟后，一声沉闷的溅水声在井底深处回荡，他抖动绳子产生的旋动已传到绳子一端的抓钩上。

Add to that the fact that some baby beavers were found in the tunnels, and suddenly the idea that beavers had made these big helical burrows didn't seem so far-fetched.

再加上在隧道中发现了一些小海狸这一事实，突然之间， 海狸制造了这些大螺旋形洞穴的想法似乎并不那么牵强。

Collagen and other structural proteins such as keratin, the protein our hair is made of, resist decay due to their linear helical structure, as well as various amino acids, the building blocks of protein that form them.

胶原蛋白和其他结构蛋白，如角蛋白(构成我们头发的蛋白质)，由于它们呈线性螺旋状结构，以及各种氨基酸(构成它们的蛋白质的基本成分)，能够抵抗衰退。

We had the software to be able to do type 1 hair, type 2 hair very easily, but we hadn't really figured out how to do coils that are actually helical and that actually look like springs.

何塞：我们有软件可以很容易地做 1 类头发和 2 类头发， 但我们还没有真正弄清楚如何制作实际上是螺旋形并且实际上看起来像弹簧的线圈。