Trouble is I haven't drawn the marginal revenue curve yet.

但问题是我们现在没有边际收入曲线啊

耶鲁公开课 - 博弈论课程节选

He slept on a mattress with a plywood board underneath it so his spine wouldn't curve.

CNN: Why polio hasn't gone away yet

That's not to say there isn't a learning curve involved.

BBC: Technology

Its best hope is that the solar cell industry doesn't follow the curve of the dram market it is often compared with--a once high-margin technology that turned suddenly, brutally, into a low-profit commodity market.

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