Income is money received for a work or from investments.收入是工作或投资所得的钱。
For a company to survive, its income needs to be more than its expenses.一个公司要生存，收入必须大于支出。
People who earn a good salary can buy what they need to survive.收入高的人可以买到他们生存所需要的东西。
A receipt is given to you after you have paid for something.你付了钱之后，就会收到收据。
A receipt is a proof that you have paid for something.收据是你付过钱的证明。
A receipt shows that something has been paid for.收据表明某物已付过款。
After paying for something, be sure to get a receipt.付款后，一定要有收据。
An invoice is a request for payment.发票是一种付款要求。
An invoice lists the prices and products being bought.发票列出了购买的价格和产品。
To invoice someone means to give them a bill for products or services.给某人开发票是指给他产品或服务的帐单。
Once an invoice is paid it can be used as a receipt.发票一旦付款，就可以当作收据使用。
Taxes are what we pay to the government for government services.税收是我们为政府服务向政府支付的费用。
Taxes pay for many services such as education, police and health care.税收用于教育、警察和医疗保健等许多服务。
An income tax is a tax on your income.所得税是对你的收入征税。
In some countries, income taxes are very high.在一些国家，所得税很高。
Interest is what we pay to lenders when we borrow money.利息是我们借钱时付给贷款人的钱。
If someone lends you money, you pay interest for the use of that money.如果有人借给你钱，你要为这笔钱的使用支付利息。
A salary is what you earn for doing your job.
People pay taxes to pay for government services.
