A black hole containing four or five times the mass of the
Sun would occupy a spherical volume just a few kilometres across.
This would curve the fabric of space so sharply that the strength of gravity would change greatly even
across the length of a human body.
在句尾,提到了引力强度会发生巨大的改变,甚至会超过人体的高度。引力强度和人体有什么关系吗?