連鎖反応

1. Origins, structure, and basic meaning

• Structure: Written 連鎖反応 and read れんさはんのう, it denotes a sequence in which one reaction triggers the next.
• Basic usage: It is used for scientific processes and for laughter or events spreading successively.

2. Common pitfalls and similar expressions

• Not mere simultaneity
  • Each stage helps cause the following stage, forming a causal chain.