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.

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现在销售额已经达到顶点，我们估计很快就会下降。

Sales have now peaked, and we expect them to decrease soon.

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由于这个环境中具有地心引力，因此向上的速度不会坚持很久；最后这个球会上升到顶点并开始下降。

Given that the world has gravity, that upward velocity won't last long; eventually, the sphere reaches the apex and begins its descent.

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That percent grew to the peak of the market in 1999; after the peak in 2000 it began to fall.

在1999年这一赞同的比例接近最高点,在2000年达到顶点后开始下降

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