Gerald’s grandfather is a shoemaker.

杰拉德的祖父是一个鞋匠。

Another cybernetician, Gerald Weinberg, supplies a fine metaphor for requisite complexity in his book On the Design of Stable Systems.

另外一位控专家，杰拉德·温伯，的著作《稳定系统的设计》中为这个“必要的复杂性”提供了一个非常贴切的比喻。