帮忙翻译分析下这句话的结构

来源:百度知道 编辑:UC知道 时间:2024/05/15 17:54:48
Today the dry West accounts for 20percent of the nation's total agricultural output If the United States is,as it appears,well on its way toward overdrawing the dry land resources,then the policy choice is simply to pay now for the appropriate remedies or pay for more later,when productive benefits from arid land resources have been both realized and largely terminated.
这是2009年考无敌第16页短文的最后一句话,拜托高手指点下,关键是句子结构我看不懂,分析好的再追50分

今天,西干帐户20percent国家的占农业总产值如果美国,因为它看来,以及其走向透支干燥的土地资源,那么,政策选择就是现在支付适当的补救措施或支付更后,生产效益干旱的土地资源都已经实现和基本终止。