4.The idea behind the geometry of the Universe is that if there's enough matter in the Universe the expansion will slow, stop, and then everything will recollapse: a sort of Big Bang in reverse.
宇宙几何背后的理念是,如果宇宙中有足够多的物质,膨胀就会放缓、停止,然后一切都会
新凝固:这是一种反向的大爆炸。