今天我们继续学习防止食物变质的方法。Nigeria，Mohammed Bah Abba，Rolex
The evaporation process creates a drop in temperature of several degrees. This cools the inner pot and helps keep food safe from harmful bacteria. Some foods can be kept fresh this way for several weeks.People throughout Nigeria began using the invention. And it became popular with farmers in other …
蒸发会使得温度下降几度，这将使得里面的那个罐子温度下降，有助于保持食品的安全，而不受有害细菌的侵入。有些食品通过这种方法能储存数周。全尼日利亚的人们都开始利用该发明，并且在非洲其它国家也渐渐流行起来。Mohammed Bah Abba在他的社区和附近5个村庄个人出资了第一批5000个罐中罐系统。2000年，瑞士的劳力士公司授…