By a cyclical movement we mean that as the system progresses in, e.g.

通过循环运动，我们的意思是随着系统的进步，例如。

More probably there will be a cyclical movement round this equilibrium position.

更有可能围绕这个均衡位置出现周期性运动。

Thus a mere change in expectation is capable of producing an oscillation of the same kind of shape as a cyclical movement, in the course of working itself out.

因此，仅仅期望的变化就能够产生与周期性运动相同形状的振荡，在其自行解决的过程中。

We do not, however, merely mean by a cyclical movement that upward and downward tendencies, once started, do not persist for ever in the same direction but are ultimately reversed.

然而，我们所说的周期性运动并不仅仅意味着向上和向下的趋势一旦开始，就不会永远朝着同一方向持续，而是最终会逆转。