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…
在冰箱發(fā)明之前，冰盒幾乎是保持食物新鮮的最好方法，而另一種使食物保鮮的方法是使用蒸發(fā)式冷卻器。一種常見的蒸發(fā)式冷卻器的設(shè)計(jì)是有幾層隔層并放有食物的高盒子。隔層是由有許多小孔的金屬板制成的。盒子兩側(cè)覆蓋有厚布。 在冷卻盒的頂部和底部各有一個(gè)裝水的容器，盒子兩側(cè)的厚布末端都浸入水中以保持濕潤。 把冷卻盒放…