translation.en: It's this entire ecosystem of low-cost parts and supplies that are produced all over the world, literally, and then redistributed to basically service this industry, and you can even buy salvaged parts.
translation.zh: 就是整套低成本零件的生态系统 产自世界各地 而后，他们重新分配到这个产业 你甚至可以通过他们买到二手零件