求翻译：This will begin the boot process for a new EC2 instance. The run method returns a Reservation object which represents a collection of instances that are all started at the same time. In this case, we only started one but you can check the instances attribute of the Reservation object to see all of the instances associated with this reservation:是什么意思？

待解决 悬赏分：1 - 离问题结束还有