谁能帮我解释一下cash flow和free cash flow的定义和意义？

free cash flow

Operating cash flow (net income plus amortization and depreciation) minus capital expenditures and dividends . Free cash flow is the amount of cash that a company has left over after it has paid all of its expenses, including investments . Negative free cash flow is not necessarily an indication of a bad company, however, since many young companies put a lot of their cash into investments, which diminishes their free cash flow. But if a company is spending so much cash, it should have a good reason for doing so and it should be earning a sufficiently high rate of return on its investments. While free cash flow doesn't receive as much media coverage as earnings do, it is considered by some experts to be a better indicator of a company's financial health.
所以自由现金流是股东评估公司价值的一个重要测量工具。它是公司给付所有现金开支以及运营投资后所持有的剩余资金，它是公司为各种求偿权者尤其是股东所能提供的回报

cash flow 也可以是借来的钱