比如，一些文章关注度上升的很快，到达顶点后急剧下降，形成一个尖锐突出的曲线。
Some stories, for example, spiked rapidly and then fell away, making a sharp, pointed shape.
本文描述了一种在平面码链曲线上检测尖锐角点的方法。
In this paper a method for detecting sharp "corners" in a chain-coded plane curve is described.
联合细分模式具有较强的曲线网插值能力，但却难以构造带有尖锐特征的复杂外形曲面。
Combined subdivision scheme is good for interpolating curve networks, but it cannot construct complex surface with sharp features.
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