An optimistic estimate is more like four to five years, Bezos said, which should grant both the Federal Aviation Administration and Amazon time to figure out just exactly how such a system would safely work. 贝佐斯表示,乐观估计时间会更长一些,比如四年或者五年,如此一来,联邦航空管理局和亚马逊都有时间找出办法,确保这样的系统安全运转。
The key technologies of the system, including the function of "CHECK", the development course of four figure modeling tools and three databases to support the system, were discussed. 研究系统的核心技术:提出CHECK系统的功能,给出四个图形建模工具的开发过程及其流程图,设计系统的三个支撑数据库,并给出关系图;