In our muscle cells, actin structures form these regular filaments that look kind of like fabric.

在我们的肌肉细胞中，肌动蛋白结构形成了这些看起来像布料的规则纤维。

It affects how galaxies rotate, how galaxies move in clusters, and how large structures form in the Universe.

它影响着星系的旋转、星系在星系团中的移动，以及宇宙中大型结构的形成。

The formations have built up over the last several months, eventually creating flat structures formed on top of one another.

这些盐层在过去几个月里逐渐形成，最终形成了一个又一个的平面结构。

Histologically, medulloblastomas often have a feature called Homer-Wright rosettes, which are dense tangles of neurons and neuroglial cells, surrounded by ring-like structures formed by tumors cells.

组织学方面，髓母细胞瘤常具有一种特征，Homer-Wright菊形团：即肿瘤细胞核围绕着密集缠结在一起的神经细胞和神经胶质细胞突起排列。

Histologically, a prominent feature are their perivascular pseudorosettes, which are ring-like structures formed by tumors cells with rod-shaped ependymal processes, like cilia, surrounding a centralized blood vessel.

从组织学上看，主要的特征是血管周假菊形团，由室管膜瘤细胞的棒状突起（如纤毛）形成的环状结构，围绕着中央的血管。

It's counterintuitive to think of black holes as energy sources, but that's exactly what they are, thanks to their accretion disks: circular, flat structures formed by matter falling into the event horizon.

把黑洞视为能量来源是一种反直觉的想法，但它们的自然特性就是如此。这要归结于它们的吸积盘（Accretion disk）：一种圆形扁平结构，由掉落在事件视界（Event horizon）内的物质构成。

One idea to explain this is that the ice is porous and fluffier inside the comet, but as it nears the Sun the ice at the surface warms and changes its structure, forming that harder crust.

对于这一现象，有一种解释是，彗星内部的冰更疏松多孔，但当它靠近太阳时，彗星表面的冰变暖并改变了结构，形成了更坚硬的外壳。