 美国通过合作购置了 300 余辆车辆和轨道车，用以确保在美国运输核材料的安全，并部署了一种自动化运输安保系统，据以确保核材料运输的安全；
 The United States has cooperated to procure over 300 vehicles and railcars for secure transportation of nuclear material in the United States and develop an automated transportation security system to ensure security of nuclear material shipments;