食物冷藏的一些方法。
Hints:
evaporative cooler
organism
damage
Before refrigerators were invented, the next best thing was an ice box. But another way to keep food fresh is to use an evaporative cooler. A common design is a tall box with several shelves inside to hold the food. The shelves are pieces of metal with many small holes through them. The sides of the…
在冰箱发明之前，冰盒几乎是保持食物新鲜的最好方法，而另一种使食物保鲜的方法是使用蒸发式冷却器。一种常见的蒸发式冷却器的设计是有几层隔层并放有食物的高盒子。隔层是由有许多小孔的金属板制成的。盒子两侧覆盖有厚布。 在冷却盒的顶部和底部各有一个装水的容器，盒子两侧的厚布末端都浸入水中以保持湿润。 把冷却盒放…