同学你好，该知识点来自沪江网校《雅思全项冲分小课堂【会员专享班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学好呀
sideline： A sideline is something that you do in addition to your main job in order to earn extra money. 兼职
part-time job：A part-time contract is a form of employment that carries fewer hours per week than a full-time job. Workers are considered to be part-time if they commonly work fewer than 30 or 35 hours per week
所以总结来说，sideline是worker有主业的情况下，所做的副业；而part time更强调是没有主业，只是工作时间少于正常全职工作的一种兼职

祝学习愉快！