These references to various types of commodities date to very early times and the use of thermal energy from the sun to evaporate water from the product and establish a stable and safe dry product.

• 这些可用于各种类型食品的加工手段可以追溯到很早的年代,它是利用太阳的热能来蒸发掉产品中的水分以获得稳定而且安全的干制食品。