可持续性不是一个选择;它是我们对后代的责任。
Sustainability isn't an option; it's a responsibility we owe to future generations.
Understanding black holes is understanding the fabric of the universe itself.
随着距离的增加,我们的知识逐渐消失,而且消失得很快。最终,我们到达了模糊的边界——我们望远镜的极限。