But the United States secretary of agriculture, Tom Vilsack, says changes to the program are necessary. He says the food aid process is too slow in many cases.

但美国农业部长汤姆·维尔萨克说，对项目作出一定的改变是必要的。他说粮食援助程序在很多情况下太慢了。

" It's just not true, " said Kathleen Merrigan, a professor of sustainable food systems at Arizona State University and a former U.S. deputy secretary of agriculture.

“这不是真的，”亚利桑那州立大学可持续食品系统教授、前美国农业部副部长凯瑟琳·梅里根说。