This law is known to hold true for galaxies at a distance of at least several billion light years.
这个定律被普遍认为同样适用于至少数十亿光年之远的星系。
Similar results probably hold true for many other animals.
类似的结果可能也适用于许多其他动物。
Another surprise is that the findings hold true for both those with children and without, but more so for nonparents.
另一个令人惊讶的是,这一发现对那些有孩子和没有孩子的父母都适用,而没有孩子的人则更适用。
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