Quasars are so distant that their light has taken billions of years to reach the Earth; consequently, we see them as they were during the formation of the universe.
语法 Sentence Correction-4536
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酥酥Suz 2015-09-13 12:38:48
Quasars离我们太远了；所以，我们（现在）看见的它们就和它们（当时）在the formation of the universe的时候一样
