Kill method which is used to kill the runningjob or action.
Kill方法,可以用来中断运行的作业或者动作。
2
A long-runningjob — say, number crunching or a large compilation — is perfect to place in the background.
一个长时间运行的工作(例如,系统管理的数值计算或大型程序的编译)最适合放在后台。
3
If we had a long runningjob such as this, we might find that it interfered with our ability (or the ability of other users) to do other work on our system.