His salary is performance-based, meaning he only gets full pay if he meets the sales targets.

performance-based 是由名词 performance（表现、绩效）和形容词 based（基于...的）组成的复合形容词。performance 指工作或任务完成的情况，based 表示"以...为基础"。 performance-based 意思是"以绩效为基础的"，即根据工作表现来决定报酬或奖励。