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.

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

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。

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？

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，复合病毒兼具二十面体和螺旋对称结，可能有复杂的外壁或头尾形态。

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。

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。

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

螺旋对称病毒的典表是烟草花叶病毒，这是研究最多的一种病毒。

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

螺旋对称、二十面体对称与复合。

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。

For example, you could tape it into a helical shape to create a deployable antenna.

例如，你可将其缠绕成螺旋形状，制作一个可展开的天线。

Now, one example of a shape that would resonate differently with left-handed and right-handed circularly polarized light would be a helix, and in fact, people will use a helical antenna when they want to pick up on radio waves with just one-handedness.

现在，一个例子就是螺旋形， 它会不同的方式与左旋和右旋圆偏振光发生共振。事实上，当人们想要接收单一手性的无线电波时， 他们会使用螺旋天线。

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：我们有软件可轻松处理1头发和2头发， 但我们还没有真正弄清楚如何做出像弹簧一样的螺旋状卷发。

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些幼崽河狸的事实，突然间认为河狸挖掘了这些大螺旋形洞穴的想法似乎也不那么牵强了。

These magnetic fields are then used to change the trajectory of the electron by bending the electrons toward the center, or optical axis, in a shrinking helical direction.

这些磁场然后被用来改变电子的轨迹，通过将电子向中心或光学轴方向弯曲，形成一个逐渐收缩的螺旋路径。

So in the same year that Francis Crick unveiled this incredible helical structure that was called a DNA strand, we also discovered the different stages of sleep.

所在弗朗西斯·克里克揭示这种被称为DNA链的惊人螺旋结的同年，我们也发现了睡眠的不同阶段。

In a solar system tilted towards the galactic plane, moving forward in a helical  shape, diving up and down through the plane.

在一个倾斜于银河平面的太阳系中，螺旋形前进，上下穿越平面。

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。