Like coarse grains of sand about 3 millimeters, 550 times smaller than you.

就像粗约3毫米的沙粒，比你小550倍。

But sandstones are much coarser grained, and it takes more energy in the water to move the sand.

但是砂岩的颗粒要粗得多，移动沙子需要水中更多的能量。

So, the coarse grain model of the universe that we are building in some sense is a resonance with objects and outside of us in the world.

因此，我们正在构建的宇宙粗粒模型在某种意义上是与物体以及我们外部世界的共振。

Desert sand is formed by the wind creating tiny, smooth particles whereas the sand found on  riverbeds and coastlines is ground down by water, producing a coarser grain  which is perfect for construction.

沙漠沙子是由风形成的细小光滑颗粒，而河床和海岸线上的沙子被水磨碎，产生更粗的颗粒，非常适合建筑。