如果你和大多数吉尔伯特实验的参与者一样，那么你会选择1号选项。
If you are like most of the participants in an experiment by Gilbert et al. (2010) then you'll go for number 1.
该跟踪选项要求在指定的系统错误号出现时立即停止跟踪。
This trace option requests that tracing be stopped once the specified number of system errors has occurred.
如果希望查看at调度执行的实际命令，那么可以使用at命令并加上- c选项和作业号。
If you want to review the actual command scheduled for execution by at, you can use the at command with the -c option and the job number.
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