So we started to recognize that the Milky Way galaxy was Element of bigger clusters of galaxies. And in some instances, clusters of galaxies have been sure jointly by gravity, sort of orbiting all over massive groups of galaxies. And in other scenarios, these concentrations of galaxies are likely about to disperse with time since the universe expands.
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A simple animation by the former NASA scientist James O'Donoghue reveals how fast all People objects are moving.
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发掘;挖出 Ice age bones are increasingly being excavated from the caves. 冰河时期的遗骸正从岩洞中发掘出来。
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Wet sand may become liquid-like when strongly shaken. The liquefied sand might move and the ground may perhaps move and crack, leading to harm to surface structures and underground utilities. By
This attachment will likely be Employed in landscaping and design. Augers are supported by hydraulic spiral blades and permit the excavator to dig holes promptly plus more conveniently.
Although it may look like it’s reliable beneath your ft, the Earth is actually a dynamic composition. The area is consistently moving.
The USGS and its cooperators have put in particles-flow monitoring gear in the biggest drainage basin at Chalk Cliffs, CO. Info collection at This web site supports analysis around the hydrologic aspects that control debris-move initiation, entrainment, and movement dynamics.
（尤指用机器）开凿，挖（洞），挖空 In tin mining currently, workers excavate tunnels horizontally from the vertical shaft. 如今开采锡矿，工人们从竖井中横向开挖隧道。
Damp sand may become liquid-like when strongly shaken. The liquefied sand may well move and the bottom may perhaps shift and crack, producing harm to floor structures and underground utilities. Find out more
didn't discover any secondary graves. From TIME Excavations have because revealed sections of a grand funerary elaborate. From Nationwide Geographic These illustrations are from corpora and from sources on the net.
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