They put it into worm recomposting systems, which produced a lot of worms, which they fed to Siberian sturgeon, which produced caviar, which they sold back to the restaurants.
接着把这些脏的垫草用来培育蠕虫 这样可以繁殖出许多的蠕虫，这些蠕虫就拿来喂食西伯利亚鲟鱼 鲟鱼生产出鱼子酱，鱼子酱再卖回去给餐厅