英语翻译流畅最重要,不要翻译器的,A few degrees can make a big difference when it comes to food storage.Foods can go bad if they get too warm.But for many of the world's poor,finding a good way to keep food cool is difficult.Refrigerators are costly and they need electricity.Yet spoiled food not only creates health risks but also economic losses.Farmers lose money when they have to throw away products that they cannot sell quickly.But in 1995,a teacher in northern Nig

英语翻译
流畅最重要,不要翻译器的,
A few degrees can make a big difference when it comes to food
storage.Foods can go bad if they get too warm.But for many of the world's
poor,finding a good way to keep food cool is difficult.Refrigerators are
costly and they need electricity.Yet spoiled food not only creates health
risks but also economic losses.Farmers lose money when they have to throw away
products that they cannot sell quickly.But in 1995,a teacher in northern
Nigeria named Mohammed Bah Abba found a solution.He developed the "Pot-in-Pot
Preservation Cooling System." It uses two round containers made of clay.A
smaller pot is placed inside a larger one.The space between the two pots
is filled with wet sand.The inner pot can be filled with fruit,vegetables or
drinks.A wet cloth covers the whole cooling system.Food stored in the smaller
pot is kept from spoiling through a simple evaporation process.Water in the
sand between the two pots evaporates through the surface of the larger
pot,where drier outside air is moving.The evaporation process creates a drop
in temperature of several degrees.This cools the inner pot and helps keep food
safe from harmful bacteria.