groups and clusters of galaxies造句

例句与造句

1. The large-scale structure of the cosmos is represented by groups and clusters of galaxies.
2. Over time, these pulled in more matter, and were often organized into groups and clusters of galaxies, then into larger-scale superclusters.
3. Most elliptical galaxies are found in the cores of groups and clusters of galaxies, and almost all those for which dark matter estimates are available are located in the centres of these larger systems.
4. It's difficult to find groups and clusters of galaxies in a sentence. 用groups and clusters of galaxies造句挺难的