Now sand is not only on Earth, but sand is ubiquitous throughout the universe. In fact, outer space is filled with sand, and that sand comes together to make our planets and the Moon.
不仅在地球上有沙 宇宙当中它们也是无处不在的 事实上 外太空 充斥着沙 它们汇聚一体 形成我们的行星和月球