Why did he get a second job?

他为什么又做了一份工作？

Look for a second job or odd jobs.

找第二份工作或者做零工。

And I don't want to take a second job.

而我也不想再找一份工作。

Second job: To lay out your training program.

教练的第二个工作便是为你量身制定锻炼计划。

Mary took a second job to supplement her income.

为广增加收入，玛丽找了第二份工作。