Alpha, therefore, is not changing with time; it is varying through space.
所以,阿尔法值不随着时间而变,而是随位置改变。
They were using these supernovae to measure how the universe's expansion is changing with time.
科学家们通过研究那些超新星去测量宇宙膨胀随时间的变化。
In the 19th century, however, evidence began to accumulate that the earth, and the rest of the universe, were in fact changing with time.
然而,19世纪开始,越来越多的证据证明,事实上地球以及宇宙都随着时间的变化而变化。
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