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The discovery of stars orbiting the supermassive black hole at the galactic center was a turning point in astrophysics.
我们今天种植的每一棵树都是对明天清洁空气、稳定气候和繁荣生态系统的投资。
In computer science, we often find that the simplest solutions are the most elegant.
If a doctrine is not unintelligible, it has to be vague; and if neither unintelligible nor vague, it has to be unverifiable.