Like spacetime, condensed matter looks like a continuum when viewed at large scales, but unlike spacetime it has a well-understood microscopic structure governed by quantum mechanics.

• 凝态物质在大尺度下，就和时空一样，看起来也是连续体，不同之处仅在于，它们的微观结构，是由我们透彻了解的量子力学所支配。