Spiral arms are where the majority of star birth occurs in the galaxy, which helps maintain the spiral pattern.

旋臂是星系中大多数恒星诞生的地方，这有助于维持螺旋模式。

The disk has grand spiral patterns in it, formed by the traffic jams of stars and nebulae, where stars are born.

这个圆盘有巨大的螺旋形图案，是由恒星和星云之间的“交通堵塞”形成的，而星云是恒星诞生的地方。

A " screw" (screw) here means a long piece of metal, about the size of a nail, that has a spiral pattern around it.

这里的“螺丝钉” （screw）指的是一根长长的金属， 大约有一颗钉子那么大， 周围有一个螺旋纹。

At this stage, they had no branches to speak of, so their leaves just grew right out of the bark, in a spiral pattern.

在这个阶段， 它们还没有分枝，所以它们的叶子只是从树皮中长出来，呈螺旋状。

It describes a movement in a twisting or what we may describe as " spiraling" pattern, moving around and around without stopping, making bigger or smaller circles.

它描述了一种扭曲的运动， 或者我们可以将其描述为“螺旋”模式，不停地绕来绕去， 形成更大或更小的圆圈。