translation.en: And the reason that is, is because in a place like this island, a lot of the sand is made of biological material because the reefs provide a place where all these microscopic animals or macroscopic animals grow, and when they die, their shells and their teeth and their bones break up and they make grains of sand, things like coral and so forth.
translation.zh: 之所以有这样的结果，是因为这个岛上 大部分的沙都是由生物材料构成的 因为礁石是许多 极小生物生长的地方 当它们死去后他们的壳和牙齿 还有骨头会分解形成沙粒 像是珊瑚等