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我国明朝时候,江苏北部曾经出现了可怕的蝗虫,飞蝗一到,整片整片的庄稼被吃掉,人们颗粒无收……徐光启看到人民的疾苦,想到国家的危机,毅然决定去研究治蝗之策。他搜集了自战国以来二千多年有关蝗灾情况的资料。在这浩如烟海的材料中,他注意到蝗灾发生的时间:151次蝗灾中,发生在农历四月的19次,发生在五月的12次,六月的31次,七月的20次,八月的12次,其他月份总共只有9次。由此,他确定蝗灾发生的时间,大多发
When the Ming Dynasty in northern Jiangsu, there had been a terrible locusts, locusts arrived, the entire piece of the crop was eaten, people confiscated particles ... ... Xu Guangqi see the people’s suffering, think of the country’s crisis, decided to go Study the policy of treating locusts. He collected more than two thousand years of information on the situation of locusts since the Warring States Period. In this voluminous material, he noticed the timing of the locust plague: 151 locusts, 19 of the lunar April, 12 of May, 31 of June, 20 of July and eight 12 times a month, a total of only 9 times in other months. As a result, he determined that locust plague occurred time, mostly hair