The rains failed last year and the staple diet of millet is running out .
去年没有下雨，而现在作为主食的小米又快吃完了。
Rice , the staple of many asian diets , has tripled in price this year .
今年以来，米价上涨了两倍，大米是许多亚洲国家的主食。
For decades , praising the middle class has been a staple of american politics .
数十年来，赞美中产阶级已经成为美国政界的一个主题。
To become a staple in the world 's energy diet ethanol needs to be commoditised , with global standards of purity and a vibrant futures market .
以全球的净化标准和未来动荡的市场来看，要成为世界上主要的能源消费品，乙醇首先需要商品化。
More recently , during the war in afghanistan , there have been widespread reports of everything from pop-tarts to staple goods being resold at local markets .
