It is well known to solve the planar potential flow problem by hydraulic flow net.

用流网法解平面势流问题，这是大家所熟知的。

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The net result is a continuous flow of gas, starting as hot gases in intergalactic space and ending as a drizzle of cool gas called a "cooling flow," falling into the central galaxy.

最终的结果是一股持续的气体流，开始是星系间的热气体，结束时是一股被称为“冷却流”的少量冷气体，落入星系中央。

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This net figure might be called free cash flow. They are the liquid funds available for interest, dividends or acquisitions.

由此得到的这一“净”指标可被称为自由现金流，它们是可用于支付利息、股息或收购款项的流动资金。

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Net operating cash flow is JPY 200 billion, against net investment cash flow of -47 billion and financing cash flow of -184 billion.

FORBES: Connect

We define free cash flow as net cash provided by operating activities less capital expenditures.

ENGADGET: Google's Q4 2011 results: $2.71 billion profit, $8.13 billion in revenue, Wall Street disappointed

He said the company's cash-flow and net subscriber additions were "light" while turnover among customers was "heavy, " an uncomforting combination.

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