“连锁反应”常见的英文表达是 “chain reaction” 。
例句：
The accident triggered a chain reaction of events that led to the company's bankruptcy.（这次事故引发了一系列连锁反应，最终导致公司破产。）
A small change in one part of the system can set off a chain reaction throughout.（系统中一个部分的小变化可能会在整个系统中引发连锁反应。）