Dr Shaffer draws a parallel with a classic virus-infection curve: high at the beginning as those most susceptible fall ill, but gradually tailing off as people adapt.

谢弗博士画了一条和传统的病毒感染曲线相平衡的曲线：在一开始的时候很高因为那些最易感的人群都得病了，但是随着人们逐渐适应，也就变得越来越少。

The method of pinhole camera which is set up at the cone of a projectile, can record the yaw-time curve directly by a frequency-flash parallel light.

用在弹头上安装针孔照相机的方法，并借助一个频闪平行光源，能够直接记录攻角——时间变化曲线。

The speed-ratio curve of double-action parallel indexing cam mechanism has special property in shape, which makes it is not available from present transmission function, but designed purposely.

双作用式平行分度凸轮机构对速比曲线的几何形态有特殊要求，这使得该机构的速比不能从同类机构现有运动规律中得到，而必须经过特殊设计。