differential returns的用法和样例：
例句
- Informants hoping to gain financial reward will often notify the I.R.S. of friends and colleagues falsifying tax returns.
第二种信息来源来自想得到报酬而将朋友和同事虚填纳税申报单通知税务局的人。 - Earnings, or the total return to labor, are the sum of returns to raw labor and the returns to human capital.
工资，或者劳动力的总报酬，是简单劳动报酬和人力资本报酬的总和。
