核连锁反应 hé lián suǒ fǎn yìng

DEFINITIONS

  1. nuclear chain reaction

CHARACTERS

核 hé seed, kernel, core, nut; atom
连 lián join, connect; continuous; even
锁 suǒ lock, padlock; shackles, chains
反 fǎn reverse, opposite, contrary, anti
应 yìng should, ought to, must