作业代表的是一个任务，例如一个可执行的文件、程序或命令。
A job is the representation of a task, such as an executable file, program, or command.
软件类代表一个软件包，可以将其分发给包含软件分发作业的设备。
The software class represents a software package that can be distributed to a device within a software distribution job.
这些小磁铁代表了不同的作业。当时钟指针到达并收集了这些磁铁，就该交作业了。
Small magnets represent different assignments. When the clock hand reached and collects the magnets - the assignments are due.
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