It might be zero for some people, but it's actually-- it is--the standard rate for people who have not negligible income is 15%.

对某些收益较少的人来说税率是零,但实际上...,对于大部分投资获利的人来说,标准税率是15%

耶鲁公开课 - 金融市场课程节选

It's not that the teachers are there for the income, but they need money too to live.

老师们并非为收入而来，但是他们也需要钱去过生活，

哈莱姆的变迁 - SpeakingMax英语口语达人