更改

许多野生动物被猎杀的原因是它们身体的某些部位可能相当有价值。目标物种越是接近灭绝，其部位的价格就越高。这就是一个正反馈的例子。

许多野生动物被猎杀的原因是它们身体的某些部位可能相当有价值。目标物种越是接近灭绝，其部位的价格就越高。这就是一个正反馈的例子。

====See also====

====See also另请参阅====

 

* Chain reaction – Sequence of reactions 链式反应 -- -- 反应的顺序

* Chain reaction – Sequence of reactions 链式反应 -- -- 反应的顺序

* Donella Meadows' twelve leverage points to intervene in a system  Donella Meadows干预系统的十二个杠杆点

* Donella Meadows' twelve leverage points to intervene in a system  Donella Meadows干预系统的十二个杠杆点

====References====

====References 参考资料====

1. ^ a b c Ben Zuckerman & David Jefferson (1996). Human Population and the Environmental Crisis. Jones & Bartlett Learning. p. 42. ISBN 9780867209662. Archived from the original on 2018-01-06.

1. ^ a b c Ben Zuckerman & David Jefferson (1996). Human Population and the Environmental Crisis. Jones & Bartlett Learning. p. 42. ISBN 9780867209662. Archived from the original on 2018-01-06.

58. ^ Positive feedback occurs when one is told he has done something well or correctly. Tom Coens and Mary Jenkins, "Abolishing Performance Appraisals", p116.

58. ^ Positive feedback occurs when one is told he has done something well or correctly. Tom Coens and Mary Jenkins, "Abolishing Performance Appraisals", p116.

====Further reading ====

====Further reading 延伸阅读 ====

* Norbert Wiener (1948), Cybernetics or Control and Communication in the Animal and the Machine, Paris, Hermann et Cie - MIT Press, Cambridge, MA.

* Norbert Wiener (1948), Cybernetics or Control and Communication in the Animal and the Machine, Paris, Hermann et Cie - MIT Press, Cambridge, MA.

* Katie Salen and Eric Zimmerman. Rules of Play. MIT Press. 2004. ISBN 0-262-24045-9. Chapter 18: Games as Cybernetic Systems.

* Katie Salen and Eric Zimmerman. Rules of Play. MIT Press. 2004. ISBN 0-262-24045-9. Chapter 18: Games as Cybernetic Systems.