critical mass

2026-04-28

n.(核链式反应的)临界质量 牛津词典 noun （核链式反应的）临界质量the smallest amount of a substance that is needed for a nuclear chain reaction to take place 柯林斯词典 (核链式反应的)临界质量In physics, the critical mass of a substance is the minimum amount of it that is needed for a...