free income

例句：

1. 1. This company has a lot of free income from its online sales.
   这家公司通过在线销售获得了大量自由收入。
2. 2. The freelance writer earns free income by writing articles for various websites.
   自由职业作家通过为各种网站撰写文章赚取自由收入。
3. 3.Free income is often used to refer to the money earned from investments that do not require regular contributions or maintenance.
   自由收入通常指从不需要定期投入或维护的投资项目中获得的钱。