请用英文解释一下什么是“连锁反应（chain reaction)”，急求！！

chain reaction

http://www.google.com.hk/search?hl=zh-TW&q=chain+reaction&btnG=Google+%E6%90%9C%E5%B0%8B&meta=&aq=f&oq=

选第二个 WIKIPEDIA 就有了!

A chain reaction is a sequence of reactions where a reactive product or by-product causes additional reactions to take place. In a chain reaction, positive feedback leads to a self-amplifying chain of events.

chain reaction —— A series of events in which each induces or influences the next.

A chain reaction is a sequence of reactions where a reactive product or by-product causes additional reactions to take place. In a chain reaction, positive feedback leads to a self-amplifying chain of events. Examples of chain reactions include:

The neutron-fission chain reaction: a neutron plus a fissionable atom causes a fission resulting in a larger nu