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1973年,阿拉伯地区开始施行石油禁运的封港政策,这使得全球很多依赖石油原材料的国家备受影响,巴西也陷入了原材料紧缺的困境,这迫使巴西政府抬高进口关
In 1973, the embargo policy of the oil embargo started in the Arab region, which affected many of the world’s countries that rely on petroleum raw materials. Brazil was also in a situation of shortage of raw materials, which forced the Brazilian government to raise the import clearance level