If the center of NGC 4258 were a star cluster, the stars would be so closely spaced that collisions between individual stars would have long ago torn the cluster apart.

如果 NGC 4258 的中心是一个星团，恒星之间的距离会非常近，以至于在很久以前单个恒星之间的碰撞就会把星团撕裂。

youdao

The women filled most of Ward 2, a long, one-story building with a cement floor and two rows of closely spaced beds against opposite walls.

这些妇女占满了几乎整个2号病房，这是一个长长的单层平房，水泥地板，两排紧挨着的病床靠墙摆放着。

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Most of these long, linear and very deep cracks trend northeast or northwest and form parallel, often regularly spaced sets.

大部分这些长线行而且很深的裂缝向东北或西北延伸，并形成平行线，而且经常定期地形成一组组间隔。

youdao

They created a material that excluded light with a wavelength of one millimetre (the long end of the infra-red spectrum), using an array of aluminium-oxide posts that were spaced evenly across a grid.

ECONOMIST: New-age crystals