英语词汇critical mass怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	critical mass
释义	critical massn. 1 the amount of fissile material needed to maintain a nuclear chain reaction 临界质量(指维持核反应堆链式反应所必需的可裂变物质数量) 2 the minimum size required to start a thing off or to keep a thing going (使事情开始或维持运行所需要的)最低数量
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