In a sign of just how far-reaching and controversial these proposed changes to Mexico's state-run energy sector are, President Enrique Pena Nieto was flanked on stage by top dignitaries from government, the oil industry unions and the military. __________________________________________The reform won't be simple to get through congress, however. The left-wing parties have made it clear they oppose any change to the constitution and the government faces a complicated task in negotiating with all sides including the powerful unions. 台上,总统培尼亚`涅托左右两侧站立着来自政府、石油行业工会和军队的高级要人,这表明了提议对墨西哥国有能源部门进行改革的深远意义和争议度._____________________________________然而这项改革不会在议会得到通过.左翼政党明确表示反对对宪法进行任何修改,政府面临着与包括强大的工会在内的各方协商的复杂任务.