广播电视英语短句 第 263 课：存储食物-1

Before refrigerators were invented, the next best thing was an ice box. 在冰箱发明之前，最好的方法使用冰盒子。

But another way to keep food fresh is to use an evaporative cooler. 另一种保持食物新鲜的方法是使用蒸发冷却器。

A common design is a tall box with several shelves inside to hold the food. 它们的共同之处都是高盒子，里面有几个存储食物的分隔空间。

The shelves are pieces of metal with many small holes through them. 这些隔板是若干个穿了小孔的金属板。

The sides of the box are covered with pieces of thick cloth.
盒子周围被包上厚厚的一层织物。