They also attract unscrupulous people who engage in nefarious activities, including child labor, human trafficking and abuse of commercial sex workers.

VOA: standard.2010.05.29

It's not that the evil scientist is just deliberately deceiving you so as to conduct his nefarious experiments.

没有邪恶的科学家,在故意欺骗你,好进行他的邪恶实验。

耶鲁公开课 - 死亡课程节选

These guys are just counting the number of people in the class for the registrar, so they're not doing anything more nefarious then that.

这些人只负责统计,班级人数然后交给注册处,所以他们不会做什么过分的事情

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

You can use this for nefarious purposes.

你可以使用这个为不法的企图。

哈佛公开课 - 计算机科学课程节选