receipt：主要是收据，收到的意思。在商务中收到信函，例如We acknowledge receipt of your letter of June 14th.
我们确认收到你六月十四日的来信。
Please keep your receipt.
收据请拿好。
income：收入, 所得, 收益。主要指个人薪金等收入。例如to provide with property, income, or a source of income 提供财产、收入或收入来源
revenue收入, 收益; 财政收入, 税收
The Inland Revenue is responsible for collecting income tax.
税务局负责徵收所得税。
Can the Internet be effectively used to generate revenue?
因特网能有效地用来创收吗？