Then we'd had 100 years of modern rain science, and that had accelerated desertification, as we first discovered in Africa and then confirmed in the United States, and as you see in this picture of land managed by the federal government.
现代的降雨研究也持续了一百年以上， 而这些研究反而加快了荒漠化， 正如我在非洲首先发现 在美国得到证实的那样， 你们现在看到的图片 是联邦政府管理的土地。