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？

Like xanthan gum, carrageenan is a long, complex polysaccharide and it's curvy helical structure makes it particularly good at binding not only with water, but also with proteins.

像黄原胶一样，角叉菜胶是一种长而复杂的多糖，它弯曲的螺旋结构使它不仅能与水结合，还能与蛋白质结合。

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。