In it was a series of equations describing how complex shapes like these can arise spontaneously from simple initial conditions.

其中有一系列方程，描述了像这样的复杂形状如何从简单的初始条件自发产生。

Nevertheless, low and simple forms will long endure if well fitted for their simple conditions of life.

然而，如果适合他们简单的生活条件， 低级和简单的形式将长期存在。